Manhunt in the Jungle (1958)

In the late 1920s, adventurer George Dyatt starts an expedition in the Amazon region in South America to search for the missing Colonel Percy Fawcett deep in the jungle. Fawcett was seeking the legendary town El Dorado, which is said to contain tons of gold and treasures. The story is based on Dyatt's book about his real life search for Fawcett.