Doctor Cyclops (1940)

Set in the Peruvian jungle, this 1940 landmark science-fiction adventure, directed by pioneering filmmaker Ernest Schoedsack, follows four explorers as they search for legendary physicist Dr.Cyclops. When they discover their missing colleague, they find his brilliant mind has been warped by radiation and decide to return him to civilization for psychiatric help. But the half-blind, half-mad scientist will have none of that, and uses an experimental body altering device to reduce his former friends to one-fifth their normal size. Now, harmless items and small creatures suddenly become giant-sized instruments of death! The impressive use of special effects, which garnered an Oscar nomination, helped make this Technicolour sci-fi classic one of the most imaginative and memorable fantasy films of all time.