Ghosts of a bizarre plane crash and a mysterious underground city point to powerful forces at work inside Grand Canyon National Park.
Ghost sightings, a secret government time-travel experiment, and Native American battles suggest that Pennsylvania's Gettysburg National Military Park is a place of unusual and mysterious power.
Believed to be the work of Pele, the fire goddess, black magic, mysterious deaths and violent fireballs haunt Hawaii Volcanoes National Park.
A tragic plane crash, shocking murders and a mysterious python infestation suggest a dark, evil power deep in the heart of Florida's Everglades National Park.
While some believe the random flashes of light at Glacier National Park in Montana are evidence of extraterrestrials, a trail of clues leads to an even more shocking theory: that the technology causing them may be Nazi in origin.
Unexplained disappearances, a mysterious death and a Karuk Indian legend are linked to a race of superhumans in California's Shasta National Forest.