Last of the Great Unknown poster
Where to stream

Last of the Great Unknown

8.0201222mMovieDocumentary

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

DirectorDan Ransom

Where to watch

Echoboom Amazon Channel Echoboom Amazon Channel
Availability shown for United Kingdom · rights vary by country

Cast · Directed by Dan Ransom

BF
Bill Formanek
Self
TMTodd Martin
Todd Martin
Self
DN
Dave Nally
Self
RR
Rich Rudow
Self
GS
Guy Smith
Self

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Last of the Great Unknown — streaming FAQ

Which OTT platform streams Last of the Great Unknown?

Last of the Great Unknown is streaming on Echoboom Amazon Channel in United Kingdom, and available to rent or buy on Apple TV Store. It's not currently on Netflix.

Is Last of the Great Unknown on Netflix?

No, Last of the Great Unknown is not on Netflix in United Kingdom as of September 2026. It's currently on Echoboom Amazon Channel.

Is Last of the Great Unknown on Amazon Prime Video?

No, Last of the Great Unknown isn't on Amazon Prime Video in United Kingdom right now. It's on Echoboom Amazon Channel instead.

Where can I watch Last of the Great Unknown for free?

Last of the Great Unknown is available on Echoboom Amazon Channel in United Kingdom, but you'll need an active subscription — there's no free option right now.