22: The Strange Disappearance of Glen and Bessie Hyde. Grand Canyon National Park

Bring your life preserves, lots of food and water, and a camera! We are taking you down an epic trip in the Grand Canyon down the Colorado River in a sweep scow boat. When newly wed couple, Glen and Bessie Hyde set out to the Grand Canyon to set records as the fastest river runners and the first woman to ever run the canyon, they had high hopes but just after a month on their journey they disappear. Their disappearance is anything but normal and they seem to just vanish into thin air. This sparks lots of rumors and theories of what could have happened to them and brings us on a long journey of possibilities. It even makes us question the motives and who people are even years later.

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Sources: Wikipedia. Strange Outdoors. Listverse. NAU.