Last of the Great Unknown

7.2

/10

22mDocumentary Sport

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

Starring Bill Formanek, Todd Martin, Dave Nally, Rich Rudow, Guy Smith

Watch "Last of the Great Unknown" from streaming services Vudu, Youtube, Vudu free and several more released in 2012. It's a documentary and sport movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.