Undine is a historian and tour guide at the Berlin City Museum specializing in urban development, while Christoph is an industrial diver. Linked by a love of the water, the two form an intense bond, which can only do so much to help Undine overcome the considerable baggage of her former affair.

A young woman in Paris goes to a party in the enormous labyrinth of limestone tunnels beneath Paris. When she becomes separated from her friends, she is convinced something is chasing her through the dark tunnels.

In 2007, in the midst of the drought and water shortages, the NSW State government has unveiled plans to tap into and recycle millions of litres of water trapped in a network of abandoned train tunnels just beneath the heart of Sydney. However the government suddenly goes cold on the plan and it is not made public why. There is talk of homeless people who use the tunnel as shelter going missing, even though the government states that there are no homeless people in there. This, and the silence from the officials and ministers, leads a journalist, Natasha to begin an investigation into a government cover-up. She and her crew Pete (Producer), Steve (Cameraman) and Tangles (Sound Technichian) decide to investigate the story in the tunnel.

Trapped in a London subway station, a woman who's being pursued by a potential attacker heads into the unknown labyrinth of tunnels beneath the city's streets

In 1984, a Russian research team goes below the surface to find out what secret the world's deepest borehole is hiding. On their expedition, something unexpectedly gruesome awaits the researchers.

A group of former military elites set out to explore an uncharted abyss, not knowing their worst nightmare is waiting for them deep beneath the ground.

A man who runs an apartment house for women is the demented son of a Nazi surgeon who has the house equipped with secret passageways, hidden rooms and torture and murder devices.

After witnessing a brutal murder in a cabin, a man hides in a crawlspace while the killers scour the property for a hidden fortune. As they draw nearer, he must decide if the crawlspace will be his tomb or the battleground in his fight for survival.

Rie is a PR-coordinator visiting a tunnel boring machine to portray the well-oiled European cooperation in the Metro construction when an accident suddenly occurs. Unable to escape, she takes refuge in an airlock with Croatian miner Ivo and Bharan, a worker from Eritrea.

In 2016 the sun has turned the entire world into a scorched and barren wasteland. The humans who have survived are either resourceful or violent, and sometimes both. Marie, her little sister Leonie, and best friend Phillip, are in a car headed to the mountains - rumor has it there is water there. Along the way they meet Tom, a first-rate mechanic. But can they trust him? Fraught with deep distrust, the group is lured into an ambush where their real battle for survival begins.

After a group of biologists discovers a huge network of unexplored caves in Romania and, believing it to be an undisturbed eco-system that has produced a new species, they hire the best American team of underwater cave explorers in the world. While exploring deeper into the underwater caves, a rockslide blocks their exit, and they soon discover a larger carnivorous creature has added them to its food chain.

When a mysterious brick wall encloses their apartment building overnight, Tim and Olivia must unite with their wary neighbors to get out alive.

When lovelorn Michael arrives in Berlin to return a set of keys to his ex-girlfriend, Gabi, as an excuse to see her again, he finds her apartment empty save for a couple of plumbers making repairs to the central heating. Just as Michael learns from the plumber’s apprentice, Harper, that Gabi has popped out for a while but will return soon, the apprentice is attacked by his boss who has unexpectedly and inexplicably transformed into a raging madman. Together, Michael and Harper manage to bundle the crazed plumber out of the apartment and barricade themselves safely inside. Within minutes, they find themselves trapped in apartment block under siege from a horde of similarly insane people, apparently hungry for human flesh.

A woman tries to survive the invasion of Berlin by the Soviet troops during the last days of World War II.

A group of students become trapped inside a mysterious cave where they discover time passes differently underground than on the surface.

Having finally secured her first assignment from her family's demolition business, Sam Walczak is sent to supervise the destruction of an apartment house, only to discover a group of tenants still living in the condemned building. One such tenant, Jimmy, tells Sam an urban legend about a serial murderer who used to live in the building and entomb his victims in the walls. What's worse, the dead are believed to still harass the residents to this day.

In 1944, in the Belgian - German border, seven German soldiers survive an American attack in the front and lock themselves in a bunker to protect the position. Under siege by the enemy and with little ammunition, they decide to explore underground tunnels to seek supplies and find an escape route. While in the tunnel, weird things happen with the group.

Deep within Buenos Aires's labyrinthine subway system, a train mysteriously disappears along with its 30 passengers. The subway officials are greatly troubled and call in topographer Daniel Pratt to help them find it. Unfortunately, the tunnels are so vast and complex, that Pratt needs his mentor Hugo Mistein to help him. Unfortunately, he has vanished too.

Terror strikes the underground train system in Moscow in the form of a flood from a collapsed tunnel. The film follows a diverse group of Moscow citizens who find themselves trapped in the city’s underground rail network, their train derailed and virtually crushed after an aging tunnel collapses. Amongst this band of survivors is softly spoken surgeon Andrey (Sergei Puskepalis), whose wife is having an affair with the conceited businessman Vlad (Anatoly Beliy). Fate brings these two men together on the same doomed train, but there is little time to resolve their differences, as the tunnel begins to quickly fill with water, forcing them to work together with the others and find a way back to the surface.

A passionate holiday romance leads to an obsessive relationship when an Australian photojournalist wakes one morning in an abandoned Berlin apartment and is unable to leave.

A fear-obsessed freelance cameraman investigates an urban legend involving mysterious spirits that haunt the subways of Tokyo.

When a team of explorers ventures into the uncharted maze of bones that lies beneath the streets of Paris, they embark on a journey into madness and terror.

Julia becomes worried about her boyfriend Holt when he explores the dark urban legend of a mysterious videotape said to kill the watcher seven days after viewing. She sacrifices herself to save her boyfriend and in doing so makes a horrifying discovery: there is a "movie within the movie" that no one has ever seen before.

A man is on his way home when the poorly constructed tunnel he is driving through collapses, leaving him trapped leaving himself for the unexpected whilst emergency services struggle to help.

A group of urbex enthusiasts travel to the backwoods of Appalachia to capture footage of abandoned houses, when they unwittingly become the subjects of a much darker video - made by a different kind of "enthusiast".

A man gets lost in an underground passage. He follows the "guide" through the passage, but one after another, strange things happen to him. Is this space real? Or an illusion? Will the man be able to escape the passage?

When four bodies are discovered among the industrial decay and urban grime of New York City, brash young detective Mike Reilly teams with ambitious Department of Health researcher Terry Huston to uncover the cause behind their violent and inexplicable deaths. The only common factor shared by the victims? Each died exactly 48 hours after logging onto a website called feardotcom.

A group of elite soldiers sent to infiltrate and extract the lead science team from Pine Gap, Australia's top secret underground military compound, after it comes under attack from unknown forces. The mission is compromised when they encounter a young woman with no memory of who she is or how she came to be there. As they try to escape, the group quickly discovers all is not as it seems and the facility has become a testing ground for something far more sinister.

Four guys on a bachelor party get off the subway at a station that shut down in the 70's and, after watching a transit cop get brutally murdered, find themselves running for their lives beneath the streets of NY.

1956, in the north of France. A group of underground miners is forced to take a professor to take samples a thousand meters underground. After a landslide that prevents them from going back up, they discover a crypt from another time, and unknowingly awaken a legendary bloodthirsty creature.

Ella discovers a terrifying secret when she becomes trapped in an underground storage facility. To survive she must join forces with a group of strangers, each with something to hide.

In order to save Paris from an international bloodbath, a grieving scientist is forced to face her tragic past when a giant shark appears in the Seine.

A mysterious diver hiding in Amsterdam's canal system embarks on a rampage of gruesome murders, terrifying city officials and leaving few clues for the city's best detective, who doesn't suspect that both his new girlfriend and twelve-year-old daughter may be closer than he is to finding the killer.

The four friends Lukas, Julius, Gino and Sanchez are trying to survive the everyday life in Neukölln, Berlin between drugs, gangs, rap, violence and boredom. Until they are one day making a serious decision with serious consequences because of a dead certain plan.

After an alien ship crash lands in a Russian city, many who see the inside and the occupants start to question their own existence while others demand the aliens leave Earth.

A civilian oil rig crew is recruited to conduct a search and rescue effort when a nuclear submarine mysteriously sinks. One diver soon finds himself on a spectacular odyssey 25,000 feet below the ocean's surface where he confronts a mysterious force that has the power to change the world or destroy it.

Four prison inmates have been hatching a plan to literally dig out of jail when another prisoner, Claude Gaspard, is moved into their cell. They take a risk and share their plan with the newcomer. Over the course of three days, the prisoners and friends break through the concrete floor using a bed post and begin to make their way through the sewer system -- yet their escape is anything but assured.

Inspired by true events, Olympic swimmer Harry Melchior defects from East Germany in the 1960s and hatches a daring plot to help his sister and others flee East Berlin through a 145-yard underground tunnel.

After a personal tragedy, Sarah joins her friends on a caving expedition in the Appalachian Mountains. But when a rockfall traps them deep underground, their adventure turns into a nightmare. As they search for a way out, the group discovers they are not alone—lurking in the darkness are savage, cave-dwelling creatures. With rising tension and dwindling trust, the women must fight to survive against both the predators and each other.

Trying to escape her broken past, Sarah O’Neill is building a new life on the fringes of a backwood rural town with her young son Chris. A terrifying encounter with a mysterious neighbour shatters her fragile security, throwing Sarah into a spiralling nightmare of paranoia and mistrust, as she tries to uncover if the disturbing changes in her little boy are connected to an ominous sinkhole buried deep in the forest that borders their home.

Imagine walking down the street and finding an unmarked VHS tape. Curiosity piqued, you take it home and pop it in. What starts off as two men screwing around with a video camera quickly transforms into an ultra-realistic torture sequence where the unidentified psychopaths tape their exploits as they torment and violate a woman tied to a chair. The devastation of your morals continues throughout the entirety of the footage, while subtly revealing the killer's shattered pasts via the interaction with their victims and each other. The most shockingly realistic portrait of a serial killer's existence is, Fred Vogel's AUGUST UNDERGROUND.

Six strangers find themselves in circumstances beyond their control, and must use their wits to survive.

Four young Jews survive the Third Reich in the middle of Berlin by living so recklessly that they become "invisible."

A man wakes up deep inside a cave. Suffering amnesia, he has no recollection of how he came to be here or of what happened to the man whose body he finds beside him. Tailed by a mysterious creature, he must continue through this strange and fantastic world. Enclosed, Tolbiac has no other option to reach the surface than to use REZO ZERO, secret observing cells in this cemetery-like abandoned mine.

Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions.

An artist slowly goes insane while struggling to pay his bills, work on his paintings, and care for his two female roommates, which leads him taking to the streets of New York after dark and randomly killing derelicts with a power drill.

Laura has recently started working in the Barcelona subway. She has been assigned the old and quiet Rocafort station, but it won't be long before she discovers that this stop harbors a legend that will begin to haunt her: many people have died there in strange circumstances over the years and no one seems to be interested in knowing the truth.

To escape her abusive boyfriend, Kat joins a wilderness expedition with a group of women, all of whom are struggling with the uncertainty of life. What was supposed to be an opportunity for personal discovery quickly becomes a fight for survival, forcing each one to discover the strength within themselves that they didn't even know they possessed. While being brazenly chased by a pack of predators, the strong quickly set themselves apart from the weak. In a battle of will, stamina, and heart, these very virtues present themselves at the most crucial moment. With death looming, each is left with what is truly important - the strength within oneself.

A tale about a strange young man, Bulcsú, and the fellow ticket inspectors on his team who work aboard the subterranean Budapest Metro. A tale about racing along the tracks, and about a mysterious serial killer. And a tale about love.

Four teenagers at a British private school secretly uncover and explore the depths of a sealed underground hole created decades ago as a possible bomb shelter.

Two families attempt a daredevil plan to escape the GDR with a homemade hot air balloon, but it crashes just before the border. The Stasi finds traces of this attempt to escape and immediately starts investigations, while the two families are forced to build a new escape balloon. With each passing day the Stasi is closer on their heels – a nerve-wracking race against time begins.

A group of researchers in Antarctica are abducted by a platoon of masked soldiers and dragged into a hidden continent in the center of the Earth. There, they discover that surviving Nazi soldiers are plotting an invasion of Earth to revive the Third Reich.

In 2015, thirty year old refugee Francis, the sole survivor of a boat that illegally crossed the Mediterranean, is drawn into Berlin's seedy underbelly.

Marc Schrader, a rookie cop caught red-handed with drugs in a police raid of an illegal rave, joins a homicide investigation conducted by Chief Inspector Minks. The victim is a naked young woman with the skin stripped off her back, killed as she staggered into traffic. As Schrader and Minks investigate the murder, the case is complicated by a finger found in the stomach of the victim. Forensic examination proves the finger belongs to Nobert Günzel, who was previously convicted of rape and assault. The police raid Günzel’s residence, and discover a blood-stained table with restraints and bits of human flesh in his basement. They also find video equipment and preserved, tattooed skin from the victim’s back. Soon, they found dead bodies buried in the garden. Günzel then goes missing.

Tad is a celebrity archaeologist and adventurer just like his hero Max Mordon... in his dreams! In reality, Tad is a Chicago construction worker. One day, however, he is mistaken for a real professor and takes his place on a flight to Peru in search of the lost city of Paititi.

A student moves in with a family that lives in an underground house in the middle of the forest, far from civilization. His hopes of peace and quiet are soon shattered, when it becomes apparent that both the parents and their son have a screw loose.

When her son vanishes inside a US consulate, ex-special forces soldier Sara does everything in her power to find him — and uncovers a dark conspiracy.

A lonely private investigator is contacted by a mysterious woman who pulls him into a mind game known as “telephone walking”. Fascinated by her voice, Aloys discovers an imaginary universe that allows him to break out of his isolation.

Three boys and two girls go backpacking from the city to a paradisiacal island. There they rent motorcycles, travel around the prettiest and most remote spots, camp out in the woods, on a coastal cliff, get drunk and swim in the sea. The following day they enter a deep, maze-like cave to explore it and get lost inside.

An aggressive police officer tries to solve the mystery behind consecutive murders. While doing so, he must fight against his inner demons.

Three American tourists follow a mysterious map deep into the jungles of Japan searching for an ancient temple. When spirits entrap them, their adventure quickly becomes a horrific nightmare.

An archaeological team attempt to unlock the secrets of a lost pyramid only to find themselves hunted by an insidious creature.

A German submarine hunts allied ships during the Second World War, but it soon becomes the hunted. The crew tries to survive below the surface, while stretching both the boat and themselves to their limits.

Billy, a single mother of two, is led into a macabre underworld while her teenage son, Bones, discovers a secret road leading to an underwater town. Both Billy and Bones must dive deep into the mystery if their family is to survive.

Fred, a raffish safe blower, takes refuge in the Paris Metro after being chased by the henchmen of a shady businessman from whom he has just stolen some documents. While hiding out in the back rooms and conduits of the Metro, Fred encounters a subterranean society of eccentric characters and petty criminals.

This is the story of Isa, who grows up in a Hamburg suburb. It might be one of the world's richest cities but every beast has its belly and here, in the very underbelly, Chiko lives in a world where violence, staking and keeping a claim, and drug taking are the norm. Where down is not an option, Chiko is determined to rise to the top, whatever and whomever it costs.

A man awakes-- without memory -- in a pit full of bodies and must figure out if the people who rescued him are the killers, or if he is the murderer.

The company of three guys and two girls makes their way to the old funicular to have an unforgettable New Year’s Eve celebration at the top of the mountain. A fun adventure turns into a nightmare when the funicular stops over the abyss. Coldness, height and fear of a slow death make them reveal their true essence and get in a fight with each other.

Jacek climbs into the taxi driven by Waldemar, tells him to drive to a remote location, then brutally strangles him, seemingly without motive.

Residents of a rundown French apartment building battle against an army of deadly, rapidly reproducing spiders.

A young couple out for a walk decide to take a stroll through a large cemetery. As darkness begins to fall they realize they can't find their way out, and soon their fears begin to overtake them.

An aggressive race of aliens took over Planet Earth and humanity's at its end, living in giant bunkers below ground. Young Military rookie S.U.M.1 (Iwan Rheon) is sent to the surface to save a group of unprotected survivors.

In the heart of a city, the inhabitants of a tower wake up one morning to find that their building is shrouded in an opaque fog, obstructing doors and windows - a strange dark matter that devours anything that tries to pass through it. Trapped, the residents try to organize themselves, but to ensure their survival they gradually succumb to their most primitive instincts, until they sink into horror...

An explosion sends fear and terror through Berlin. Young Maxi's home is reduced to rubble and ashes, burying her mother and little brothers. Only she and her father survive the terrorist bomb attack. When she happens to meet the charismatic Karl, who tells her about a conference for young people in Prague, she seizes the opportunity to flee Berlin and her grieving father. The political movement behind the meeting claims to be working for a better Europe. Maxi has no idea how close the murderers really are to her family.

Four teenage girls go on a diving adventure to explore a submerged Mayan city. Once inside, their rush of excitement turns into a jolt of terror as they discover the sunken ruins are a hunting ground for deadly great white sharks. With their air supply steadily dwindling, the friends must navigate the underwater labyrinth of claustrophobic caves and eerie tunnels in search of a way out of their watery hell.

After getting a car ride from an unknown man, Lisa wakes up in a tube. On her arm is strapped a bracelet with a countdown. She quickly understands that every 8 minutes, fire burns an occupied section. She has no choice but to crawl into safe sections to survive. To know why she’s there and how to get out, Lisa will have to face the memories of her dead daughter…

When a truck crashes inside a tunnel, people on their way home for Christmas are brutally trapped in a deadly fire. With a blizzard raging outside, and the first responders struggling to get to the accident, it's every man for himself.

28-year-old medicine student Malina wakes up disoriented in a locked trunk and realizes, to her horror, that she is missing more than just her memory of what happened. With her phone as the only link to the outside world, the intelligent young woman wages a desperate fight for survival while the vehicle races relentlessly toward a terrible secret.

A rash of bizarre murders in New York City seems to point to a group of grotesquely deformed vagrants living in the sewers. A courageous policeman, a photojournalist and his girlfriend, and a nutty bum, who seems to know a lot about the creatures, band together to try and determine what the creatures are and how to stop them.

A man becomes the superintendent of a large New York City apartment building where people mysteriously go missing.

20 volunteers agree to take part in a seemingly well-paid experiment advertised by the university. It is supposed to be about aggressive behavior in an artificial prison situation. A journalist senses a story behind the ad and smuggles himself in among the test subjects. They are randomly divided into prisoners and guards. What seems like a game at the beginning soon turns into bloody seriousness.

A group of strangers find themselves trapped in a maze-like prison. It soon becomes clear that each of them possesses the peculiar skills necessary to escape, if they don't wind up dead first.

A bunch of crooked cops raid a ruined building located in an impoverished suburb of Paris, determined to furiously avenge the death of one of them, murdered by the ruthless criminal gang hidden on top of the dark labyrinth that will become a deathly trap when the living, unexpectedly turned into the undead by a mysterious plague, begin to devour the world.

A group of students investigates a series of mysterious bear killings, but learns that there are much more dangerous things going on. They start to follow a mysterious hunter, learning that he is actually a troll hunter.

Lola receives a phone call from her boyfriend Manni. He lost 100,000 DM in a subway train that belongs to a very bad guy. She has 20 minutes to raise this amount and meet Manni. Otherwise, he will rob a store to get the money. Three different alternatives may happen depending on some minor event along Lola's run.

Martin, a law student, takes up a job as a nightwatchman at a mortuary to fund his studies. But the mortuary harbours a dark secret, and he has to find the truth before he is implicated in a serial murder case.

Trapped inside a fortified home owned by a mysterious couple, a young boy quickly learns the true nature of the homicidal inhabitants, and secret creatures hidden deep within the walls.

Upon learning that his days are numbered, a man and an old friend return to an old house that connects them by a dark secret. Along with three women and a mysterious old man, the group journeys into a horrifying abyss of debauchery and moral mayhem, leading to a fatal turn of events, during which the darkest human depths are revealed.

Steffen Vogt, aged around 25, is helping out at a German archeological excavation in Israel when he finds a 2,000-year-old skeleton holding the instructions for a video camera dating from the year 2003. The bones also show traces of the present day. His theory of a time-traveler who made a video of Jesus is laughed at by everyone, however, including Sharon, an attractive Israeli woman he adores. Although no one appears to believe him, his find certainly seems to have generated interest: Steffen is attacked shortly afterwards in his hotel room by strange men; then he discovers that the German embassy and the secret service are after him; and when his friend Dan is murdered, he goes into hiding.

George, host of a television show focusing on literature, receives videos shot on the sly that feature his family, along with disturbing drawings that are difficult to interpret. He has no idea who has made and sent him the videos. Progressively, the contents of the videos become more personal, indicating that the sender has known George for a long time.

Lucas and Clementine live peacefully in their isolated country house, but one night they wake up to strange noise. They're not alone... and a group of hooded assailants begin to terrorize them throughout the night.

A group of teenagers suffer a terrible accident during a joy ride and get trapped at the bottom of a ravine.

The company soldier Hannah and the scientists Gavin and Dimitri are researching an algae project on board the Rubikon space station, which is supposed to permanently supply humanity with oxygen and food. But suddenly the earth disappears below them in a brown, toxic fog and all contact is broken off - are they the last survivors of humanity? Should they initiate the safe station, dare the return flight and thereby risk their lives?

As the Swedish town of Kiruna sinks, Frigga finds herself torn between her family and her job as security chief at the world's largest underground mine.

Medical student Paula wins a place at an exclusive Heidelberg medical school. When the body of a young man she met on the train turns up on her dissection table, she begins to investigate the mysterious circumstances surrounding his death.

Detective Emily Eden is a tough New York City cop forced to go undercover to solve a puzzling murder. Her search for the truth takes her into a secret world of unwritten law and unspoken power, a world where the only way out is deeper in.

Three people from different walks of life find themselves trapped inside a stalled elevator. What at first seems like an inconvenience rapidly escalates into a nightmare.

After the elevators at a New York City skyscraper begin inexplicably malfunctioning, putting its passengers at risk, mechanic Mark Newman and reporter Jennifer Evans begin separate investigations. Newman gets resistance from superiors at his company, which manufactured the elevator, while additional elevator incidents cause several gruesome deaths. The police get involved and suspect that terrorists are responsible, but a far stranger explanation looms.

Nationwide quietness. The streets are empty. Everyone’s glued to their screens at home, watching the final game. In the outskirts of Denmark, close to the German border, a small gas station needs to be open for service, even on this special night. Two young women have the shift. Ambitious Agnes is in the backroom putting finishing touches on her thesis, while free-spirited Belinda is on her phone, hoping to get the attention of her boyfriend. Unfortunately, the shift is not going to be as uneventful as they think, because no customers also means no witnesses, and the girls have been spotted to play a special part in a very different sort of game.