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.
A man, crippled in an accident, returns to the woods after rehabilitation, certain that he'll not see Bigfoot again.
In a Asian desert, a team of explorers learn of a newly discovered cave system and set out to explore it. However as soon as they begin the descent, it becomes clear that this was a secret that should have remained below the surface.
A woman brings her family back to her childhood home, which used to be an orphanage, intent on reopening it. Before long, her son starts to communicate with a new invisible friend.
A young woman must use her survival skills to track down her little sister and exact revenge on the men who abducted her.
Descending into a cave, two men seek answers to a book of unknown horrors. What will they find and will their sanity prevail?
Under the border leading into Mexico, within a labyrinth of caves, a deadly presence haunts all who enter. For four friends on an expedition, the caverns become an underground graveyard as the tortured ghosts prey upon them, one by one.
After being kidnapped by four masked men, a teacher and her students rebel by plotting against the criminals.
Young married couple Zach and Emmy decide to take a hot air balloon trip across the Italian Dolomites to rekindle their relationship. When they and pilot Harry are joined by a third passenger, Julia, events unfold in ways they could never imagine five thousand meters in the air.
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.
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.
A group of holidaymakers must fight for their lives against a rampaging hippo on the loose after becoming lost in the Louisiana swamplands.
After finding a mysterious totem in a cave while on a hike with her friend, a wayward teenage girl goes missing.
Stranded deep in the woods, a young married couple is taken in by an isolationist family, one that lives off the blood and plunder from lost hikers, and they want the couple to stay for the rest of their lives.
Based on the true nail-biting mission that captivated the world. Twelve boys and the coach of a Thai soccer team explore the Tham Luang cave when an unexpected rainstorm traps them in a chamber inside the mountain. Entombed behind a maze of flooded cave tunnels, they face impossible odds. A team of world-class divers navigate through miles of dangerous cave networks to discover that finding the boys is only the beginning.
On the trail of a missing girl, an ex-cop comes across a secretive group attempting to summon a terrifying supernatural entity.
A scuba diver in search of his deceased father's remains gets swallowed by an 80-foot, 60-ton sperm whale and has only one hour to escape before his oxygen runs out. After giving up on life, the young man is surprised to find a reason to live in the most dangerous and unlikely of places.
A platoon of U.S. soldiers in Afghanistan become trapped in a cave and are hunted down by a deadly creature the locals call Karnoctus.
Master diver Frank McGuire has explored the South Pacific's Esa-ala Caves for months. But when his exit is cut off in a flash flood, Frank's team—including 17-year-old son Josh and financier Carl Hurley are forced to radically alter plans. With dwindling supplies, the crew must navigate an underwater labyrinth to make it out.
In Red Canyon, Regina and Devon return to their family home in the badlands of Utah to face the memory of a brutal attack - and put it behind them. But in coming home they awaken a killing rage in a town where everyone has ties that bind.