With over 52 million acres, the US National Park system is home to some of the most breathtaking natural features on the planet. Ten's of millions enjoy these parks every year.  Join us this week for an installment of, “National Park Cold Cases” as we explore Yosemite National Park.  Cases covered in this episode: David Paul Morrison, Walther Reinhard, & George Penca.  (Episode 92)

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Learn about other unsolved missing persons cases in America's wilderness at Locations Unknown.  

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