Bizarre incidents in Big Bend National Park point to alien activity.

Strange events point to a malevolent force in Death Valley National Park.

Strange events point to the existence of intra-dimensional portals.

Odd events in Apache-Sitgreaves National Forests point to an alien base.

A powerful secret society could be behind strange incidents in the Smokies.

Demonic figures in Mark Twain National Forest point to dark forces at work.

North America's outdoor country represents an expanse of virtually unexplored wilderness, making it a hotbed for mysteries and the unexplained. There have been hundreds of true tales reported by people every year. Now through eyewitness accounts and key facts, the hidden stories of these beautiful locales are revealed. TravelChannel.com

North America's outdoor country represents an expanse of virtually unexplored wilderness, making it a hotbed for mysteries and the unexplained. There have been hundreds of true tales reported by people every year. Now through eyewitness accounts and key facts, the hidden stories of these beautiful locales are revealed. TravelChannel.com

North America's outdoor country represents an expanse of virtually unexplored wilderness, making it a hotbed for mysteries and the unexplained. There have been hundreds of true tales reported by people every year. Now through eyewitness accounts and key facts, the hidden stories of these beautiful locales are revealed. TravelChannel.com