Terrifying Stories From Inside America's National Parks

January 1980. A National Park Service employee in Arizona sets out on a hike — and vanishes. Never seen again. October 1996. Another NPS employee disappears in Washington State. Months later, her remains are finally found . . . close to where she first went missing. Stories like these stretch back more than a century, even before the birth of the NPS in 1872. America's National Park System is a shining achievement — but it has a dark side.