Watch Last of the Great Unknown (2012) Online

The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls. Read More

Watch Last of the Great Unknown online. Featuring Bill Formanek and Todd Martin, Last of the Great Unknown is classified as Documentary genre movie with an average rating across the web of 8. It is available for streaming online in the USA on 6 services such as Google Play Movies and YouTube. The movie was filmed in United States of America and was released on 2012. Last of the Great Unknown was directed by Guy Smith,Dan Ransom. Read Less