Last of the Great Unknown poster

MOVIE · 2012

Last of the Great Unknown

★ 8.0Documentary

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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ABOUT

Story

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

CAST

Featured cast

Bill FormanekSelf

Todd MartinSelf

Dave NallySelf

Rich RudowSelf

Guy SmithSelf

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