AllMovie

In this documentary, the high-risk sport of cave diving is investigated by Mike Madden, one of the few professional cave divers in the world. The video follows him from dive shop to dive site as he prepares to undertake one of the most dangerous endeavors in the sporting world, one in which 400 divers have died during the past 15 years. Outside: Rivers Into the Unknown also offers a peek into one the most exotic environments on earth, the Nohoch caves that lie under the Amazon basin. Madden was one of the first to explore and document this system and is able to guide viewers through its high points. This video was produced in association with Outside magazine.