The Lost World (1960 film)

The Lost World is a 1960 De Luxe Color and a CinemaScope fantasy adventure film loosely based on the novel of the same name by Arthur Conan Doyle and directed by Irwin Allen. The plot of the film revolves around the exploration of a flat mountain in Venezuela inhabited by cannibals, dinosaurs, carnivorous plants, and giant spiders. The cast includes Claude Rains, David Hedison, Fernando Lamas, Jill St. John, and Michael Rennie.

Allen purchased the rights to Doyles novel for 100,000. He received finance to make the film from Buddy Adler, head of production at 20th Century Fox.Special effects for the film were rather basic and involved monitor lizards, iguanas, and crocodiles affixed with miniature horns and fins. Director Allen later stated that though he wanted stop motion models, he could only work with lizards and live creatures in accordance with the studios budget.citation needed ........

Source: Wikipedia