Author David Paulides has said that a number of disappearances in national parks cannot be explained.

America's vast national parks have long been sold as places of beauty, solitude and adventure. But for some UFO researchers, ...

Four years after a 3-year-old vanished in Colorado, his shoes and clothing were discovered intact on a steep mountain slope, ...

Washington State follows investigator David Paulides as he examines a series of unexplained disappearances in and around Mount Rainier and Olympic National Park, where hikers, climbers, and ...