Last of the Great Unknown
Genre:
Short, Sport
Countries:
United States
Release Date: April 26, 2012
Year: 2012
Runtime:22 min
IMDb Rating:
The story of Grand Canyon’s hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.
Todd Martin, Bill Formanek, Dave Nally, Rich Rudow