Last of the Great Unknown
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" on Apple TV+ (itunes) 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, and is currently only available for purchase or rent.
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