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Last of the Great Unknown 2012
Genre: Documentary, Short, Sport
Director: Dan Ransom
Cast: Bill Formanek, Todd Martin, Dave Nally
Released: 26 Apr 2012
Runtime: 22 min
Language: English
Country: United States
The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.
Ratings
Internet Movie Database
7.4/10
