Sir Arthur Conan Doyle's The Lost World

The Lost World is a 1925 American silent fantasy giant monster adventure film adapted from Arthur Conan Doyle's 1912 novel of the same name.

The film was produced and distributed by First National Pictures, a major Hollywood studio at the time, and stars Wallace Beery as Professor Challenger.

It was directed by Harry O. Hoyt and featured pioneering stop motion special effects by Willis O'Brien.