The Land Unknown is a 1957 science fiction CinemaScope adventure film about a naval expedition trapped in an Antarctic jungle.

Commander Harold Roberts is leading an expedition into Antarctica for the United States Navy to study waters which are unexpectedly warm for a place so close to the South Pole.

Even search planes passing directly overhead cannot pick up their radio calls, and when they try to straighten the bent rod, it breaks.

As the crew split up to scout the area, Maggie is abducted by Dr. Carl Hunter, the lone survivor of a plane crash from a 1947 expedition.

The Elasmosaurus returns and, having learned from its previous encounter with Hunter, submerges before he can get close enough to use a torch, then surfaces beneath his raft, upending it.

The studio originally planned to make The Land Unknown a lavish, Technicolor feature, but the movie's budget was slashed after the disappointing box office performance of Universal's This Island Earth (1955).

Although the feature was shot in CinemaScope, black-and-white film was used, and plans to shoot at the off-studio back lot Falls Lake were canceled.

Universal Studios Home Entertainment released it on DVD in 2007 as part of a boxed set called The Classic Sci-Fi Ultimate Collection Vol.

[6] Kino Lorber's 2019 Blu-ray release featured a fact-filled audio commentary by Tom Weaver and David Schecter.

Matt Brunson of Film Frenzy gave it 2 out of 4 and called it "A lesser entry in Universal's robust run of 50s sci-fi flicks.