Navy Commander Alan Roberts is assigned to lead an expedition to Little America in Antarctica to investigate reports of a mysterious warm water inland lake discovered a decade earlier. His helicopter and its small party, including reporter Maggie Hathaway, is forced down into a volcanic crater by a fierce storm. They find themselves trapped in a lush tropical environment that has survived from prehistoric times.
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The Land Unknown is a 1957 American science fiction CinemaScope adventure film about a naval expedition trapped in an Antarctic jungle. The story was allegedly inspired by the discovery of unusually warm water in Antarctica in 1947. It stars Jock Mahoney and Shirley Patterson and was directed by Virgil W. Vogel. The film's low-budget special effects include men in dinosaur suits, puppets and monitor lizards standing in for dinosaurs.
