Unknown World (1951) is a Adventure, Science Fiction film that follows with the cyclotram, an atomic-powered rock-boring vehicle, Dr. Jerimiah Morley leads an expedition into a subterranean world. Currently, you can watch Unknown World on YouTube TV, Philo, Night Flight Plus, Screambox Amazon Channel. Streaming availability may vary by country and platform over time. It has a user rating of 4.4 out of 10 from 34 votes. Fans of adventure movies may also want to explore similar titles below.