Last of the Great Unknown

Name: Last of the Great Unknown
Director: Dan Ransom
Genre: Documentary, Short, Sport
Released: 2012-04-26
Duration: 1320000 s
Cast: Bill Formanek, Todd Martin, Dave Nally

Directed by Dan Ransom

Not Rated

2012 22mDocumentary, Short,

7.2

The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.