Beneath The Pennines: The Lancaster Hole

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

In 1909, two explorers fight to survive after they're left behind while on a Danish expedition in ice-covered Greenland.

A Victorian gentleman hopes to find his long-lost son, who vanished while searching for a mysterious Viking community in a volcanic valley somewhere in uncharted Arctic regions. The gentleman puts together an expedition team to go on the search, but when they reach their destination they must escape from some Viking descendants who will kill to keep their existence a secret.

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.

An amateur historian defies the academic establishment in her efforts to find King Richard III's remains, which were lost for over 500 years.

An Edinburgh professor and assorted colleagues follow an explorer's trail down an extinct Icelandic volcano to the earth's center.

A true-life drama in the 1920s, centering on British explorer Col. Percy Fawcett, who discovered evidence of a previously unknown, advanced civilization in the Amazon and disappeared whilst searching for it.

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.

After the disappearance of a young scientist on a business trip, his son and wife struggle to cope, only to make a bizarre discovery years later – one that may bring him home.

Ellesmere Island, northern Canada, 1908. Josephine, a brave but naive woman, embarks on a dangerous journey through inhospitable regions in search of her husband, the explorer Robert Peary, who tries to find a route to the North Pole.

Werner Herzog gains exclusive access to film inside the Chauvet caves of Southern France, capturing the oldest known pictorial creations of humankind in their astonishing natural setting.

Dug, along with his sidekick Hognob, unite a cavemen tribe to save their hidden valley from being spoiled and, all together as a team, to face the menace of a mysterious and mighty enemy, on the turf of an ancient and sacred sport.