The Mystery Beneath (2015) is a Documentary film that follows a group of treasure hunters discover a mysterious object at the bottom of the Baltic Sea in this documentary. Theories abound about the large object's origins. It might be a UFO, manmade, or it might be a naturally occurring phenomenon. Nobody knows. Currently, you can watch The Mystery Beneath on Magellan TV, Xive TV Documentaries Amazon Channel, Amazon Video, Apple TV Store. Streaming availability may vary by country and platform over time. Fans of documentary movies may also want to explore similar titles below.