- Season 2
- Season 1
- Specials
Reptoids at Lassen Volcanic National Park may be part of a vast conspiracy.
Mysterious lights point to aliens in Great Sand Dunes National Park.
Ghost sightings suggest Gettysburg, PA, is a place of mysterious power.
The Chupacabra may be linked to UFO sightings in El Yunque National Forest.
A superhuman race may be linked to disappearances at Mount Shasta.
Glacier National Park may hide Nazi scientists in an underground base.
Joshua Tree National Park may be ground zero for alien genetic experiments.
Black magic, mysterious deaths and violent fireballs haunt Hawaii's Volcanoes National Park. Many believe this is the work of Pele, the fire goddess.
A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are among the bizarre phenomena found in Canyonlands National Park, where the mineral quartz may be acting as a recorder of human experience.
The shimmering waters of Crater Lake National Park captivates visitors, but they may also be the epicenter of dark, sinister forces from Native American lore that lure visitors to their deaths, concealing a terrifying monster.
The ancient Anasazi built Chaco Canyon National Historical Park, but now the area is stalked by shape-shifting creatures and visited by time travelers who left behind a mysterious artifact.
Mark Twain National Forest, haunted by hellhounds and other demonic creatures, may also conceal treasures from a lost civilization, pointing to the area's importance as a locus of dark, mysterious energies.
Mysterious lights, mechanical sounds from deep within the Earth and the disappearance of dozens of aircraft over the Great Smoky Mountains National Park could be evidence of a powerful secret society with an underground base in the area.
A tragic plane crash, shocking murders, and mysterious python infestation suggest a dark, evil power at the heart of Florida's Everglades National Park.
An alien abduction and strange encounters with a humanoid monster in Apache-Sitgreaves National Forests point to a longtime extraterrestrial presence in the area.
Ghosts from a bizarre plane crash and a mysterious underground city point to powerful forces at work inside the Grand Canyon National Park.
Terrifying encounters with gun-wielding ghosts and strange, savage creatures in Cleveland National Forest leads to the discovery of the area's bloody and tragic history and its link to the existence of portals into other dimensions.
A series of disturbing deaths and disappearances, plus the unearthing of artifacts from an ancient race of people in Death Valley National Park leads to the discovery of malevolent forces that are believed to inhabit the park's secret underworld.
A bizarre series of incidents in Big Bend National Park suggests that extraterrestrials are present in this remote wilderness area, leading experts to conclude that aliens have been secretly mining rare minerals there for years.
Ghost and UFO sightings, mysterious disappearances and a prehistoric pterodactyl at Yosemite National Park suggests a rift in the fabric of time.
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