Mysteries at the National Parks

Portal to the Underworld (Season 1, Episode 7)

TV-PG

TV Episode | 22 min | Mystery

Ghosts of a bizarre plane crash and a mysterious underground city point to powerful forces at work inside the Grand Canyon National Park.

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Release date

May 22, 2015 (United States)

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Cast	+ Add Cast
2 cast members

Name	Known for
Ross Huguet Narrator (voice) Narrator (voice) See fewer	Building Off the Grid: Big Sky Ranch (2016)
Christopher O'Brien Self Self See fewer	The Phenomenon (2020)

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