Last of the Great Unknown
2012
8
22 min
Documentary
The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.
Director: Dan Ransom
Cast: Bill Formanek, Todd Martin, Dave Nally, Rich Rudow, Guy Smith
Released: 4/26/2012
Official Trailer
Plot
The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.
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