Chaco Culture National Historical Park: The ancient Anasazi built this historical park, but now it's stalked by Skinwalkers and visited by time-travelling Wingmakers.
Crater Lake National Park: The shimmering waters captivate visitors, but they may also be the epicentre of dark and sinister forces from Native American lore.
Great Smokey Mountains National Park: Mysterious lights and sounds and the disappearance of aircraft over Great Smokey Mountains National Park may be evidence of a secret society.
Apache Sitgreaves National Forests: An alien abduction and other strange encounters in the Apache-Sitgreaves National Forests point to an extra-terrestrial presence in the area.
Cleveland National Forest: Encounters with gun-wielding ghosts and strange creatures in Cleveland National Forest lead to the discovery of the area's bloody and tragic history.
Gettysburg National Military Park: Many believe Gettysburg National Military Park is haunted by its violent past - here, explore some incredible claims about the park's history.
El Yunque National Forest: Few know that one of the US's most mysterious National Parks is in Puerto Rico - a place some believe is home to a creature known as the chupacabra.
Mount Shasta National Forest: From inexplicable disappearances to mysterious experiments, events in Mount Shasta National Park may be explained by an ancient Karuk Indian legend.
Glacier National Park: In Montana's Glacier National Park, some claim that there is a hidden underground Nazi base that may even have been the final hideout for Hitler himself.
Canyonlands National Park: A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are among the bizarre phenomena found in Canyonlands National Park.
Crater Lake National Park: The shimmering waters captivate visitors, but they may also be the epicentre of dark and sinister forces from Native American lore.
Chaco Culture National Historical Park: The ancient Anasazi built this historical park, but now it's stalked by Skinwalkers and visited by time-travelling Wingmakers.
Crater Lake National Park: The shimmering waters captivate visitors, but they may also be the epicentre of dark and sinister forces from Native American lore.
Great Smokey Mountains National Park: Mysterious lights and sounds and the disappearance of aircraft over Great Smokey Mountains National Park may be evidence of a secret society.
Apache Sitgreaves National Forests: An alien abduction and other strange encounters in the Apache-Sitgreaves National Forests point to an extra-terrestrial presence in the area.
Cleveland National Forest: Encounters with gun-wielding ghosts and strange creatures in Cleveland National Forest lead to the discovery of the area's bloody and tragic history.
Apache Sitgreaves National Forests: An alien abduction and other strange encounters in the Apache-Sitgreaves National Forests point to an extra-terrestrial presence in the area.
Cleveland National Forest: Encounters with gun-wielding ghosts and strange creatures in Cleveland National Forest lead to the discovery of the area's bloody and tragic history.
Death Valley National Park: Discover the forces living in the secret underworld of Death Valley National Park, where a series of deaths and disappearances have taken place.
Canyonlands National Park: A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are among the bizarre phenomena found in Canyonlands National Park.
Crater Lake National Park: The shimmering waters captivate visitors, but they may also be the epicentre of dark and sinister forces from Native American lore.
Great Smokey Mountains National Park: Mysterious lights and sounds and the disappearance of aircraft over Great Smokey Mountains National Park may be evidence of a secret society.
Apache Sitgreaves National Forests: An alien abduction and other strange encounters in the Apache-Sitgreaves National Forests point to an extra-terrestrial presence in the area.
Cleveland National Forest: Encounters with gun-wielding ghosts and strange creatures in Cleveland National Forest lead to the discovery of the area's bloody and tragic history.
Gettysburg National Military Park: Many believe Gettysburg National Military Park is haunted by its violent past - here, explore some incredible claims about the park's history.
El Yunque National Forest: Few know that one of the US's most mysterious National Parks is in Puerto Rico - a place some believe is home to a creature known as the chupacabra.
Crater Lake National Park: The shimmering waters captivate visitors, but they may also be the epicentre of dark and sinister forces from Native American lore.
Chaco Culture National Historical Park: The ancient Anasazi built this historical park, but now it's stalked by Skinwalkers and visited by time-travelling Wingmakers.
Mark Twain National Forest: Mark Twain National Forest, haunted by hellhounds and other demonic creatures, may also conceal treasures from a lost civilisation.
Great Smokey Mountains National Park: Mysterious lights and sounds and the disappearance of aircraft over Great Smokey Mountains National Park may be evidence of a secret society.
Everglades National Park: A plane crash in the Everglades National Park leads to strange hauntings - and some believe the park may exert a dark, transformative power.
Grand Canyon National Park: A strange series of events in Grand Canyon National Park leads researchers to speculate whether its power comes from forces that cannot be explained.
Gettysburg National Military Park: Many believe Gettysburg National Military Park is haunted by its violent past - here, explore some incredible claims about the park's history.
El Yunque National Forest: Few know that one of the US's most mysterious National Parks is in Puerto Rico - a place some believe is home to a creature known as the chupacabra.
Mount Shasta National Forest: From inexplicable disappearances to mysterious experiments, events in Mount Shasta National Park may be explained by an ancient Karuk Indian legend.
Glacier National Park: In Montana's Glacier National Park, some claim that there is a hidden underground Nazi base that may even have been the final hideout for Hitler himself.
Mount Shasta National Forest: From inexplicable disappearances to mysterious experiments, events in Mount Shasta National Park may be explained by an ancient Karuk Indian legend.
Glacier National Park: In Montana's Glacier National Park, some claim that there is a hidden underground Nazi base that may even have been the final hideout for Hitler himself.
Grand Canyon National Park: A strange series of events in Grand Canyon National Park leads researchers to speculate whether its power comes from forces that cannot be explained.
Canyonlands National Park: A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are among the bizarre phenomena found in Canyonlands National Park.
Canyonlands National Park: A demonic truck driver, disembodied voices, nightmarish skinwalkers and a time loop are among the bizarre phenomena found in Canyonlands National Park.
Crater Lake National Park: The shimmering waters captivate visitors, but they may also be the epicentre of dark and sinister forces from Native American lore.