Unknown World

The US military is running a test for a special type of radio transmitter, to be used to communicate with submarines, in a deep system of underground...

A giant octopus, whose feeding habits have been affected by radiation from H-Bomb tests, rises from the Mindanao Deep to terrorize the California...

Teenagers from a small town and their high school science teacher join forces to battle a giant mutant spider, living in a cave nearby and getting...

Professor Fergusson plans to make aviation history by making his way across Africa by balloon. He plans to claim uncharted territories in West Africa...

A warrior returning home to his country must battle giant bats, three-headed dogs and a vicious dragon to save his wife, and his people, from the...

Four scientists and a newsman crash land on Mars and meet martians who act friendly.

Anthropologist Dr Brockton unearths a primitive troglodyte — an Ice Age 'missing link': half-caveman, half-ape — in a local cave. Through...

Best friends Hazel Findlay and Maddy Cope journey to the rocky outer reaches of Mongolia, on a quixotic search for new trad routes.

The story of Captain Richard Francis Burton's and Lt. John Hanning Speke's expedition to find the source of the Nile river in the name of Queen...

Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors....

When her archaeologist father disappears on an expedition, Wanda sets out to look for him. What she finds is a secret underground world, where no one...

When a successful, but emotionally exhausted woman seeks to find herself on a solo hike, she must face a primal darkness or lose herself entirely.