April 26th, 2012
Last of the Great Unknown
Documentary
8.0
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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Cast
Acting
Bill Formanek
Self
Acting
Todd Martin
Self
Acting
Dave Nally
Self
Acting
Rich Rudow
Self
Directing
Guy Smith
Self
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