All Seasons

Season 1

  • S01E01 Portal to the Underworld

    • October 23, 2015
    • Travel Channel

    Ghosts from a bizarre plane crash and a mysterious underground city point to powerful forces at work inside the Grand Canyon National Park.

  • S01E02 Flight To Hell

    • October 29, 2015
    • Travel Channel

    A tragic plane crash, shocking murders, and mysterious python infestation suggest a dark, evil power at the heart of Florida's Everglades National Park.

  • S01E03 Firestarter

    • October 29, 2015
    • Travel Channel

    Black magic, mysterious deaths, and violent fireballs haunt Hawaii's Volcanoes National Park. Many believe this is the work of Pele, the fire goddess.

  • S01E04 Ape Man and Aliens

    • October 29, 2015
    • Travel Channel

    A Bigfoot-like creature and UFO sightings suggest that California's Joshua Tree National Park may be ground zero for alien genetic experiments.

  • S01E05 Nazi UFOs

    • November 6, 2015
    • Travel Channel

    A secret, underground Nazi base may be the reason for UFO sightings in Montana's Glacier National Park. It may also be the final hideout for Adolf Hitler himself.

  • S01E06 The Land of the Lost

    • November 13, 2015
    • Travel Channel

    Unexplained disappearances, a mysterious death and a Karuk Indian legend may be linked to a race of superhumans in California's Mount Shasta National Forest.

  • S01E07 Chupacabra Island

    • November 13, 2015
    • Travel Channel

    The fabled Chupacabra in Puerto Rico's El Yunque National Forest may be linked to UFO sightings in the area and a secret US government research facility.

  • S01E08 Haunted Battleground

    • November 13, 2015
    • Travel Channel

    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.

Season 2

  • S02E01 Strange Attractions

    • June 22, 2017
    • Travel Channel

    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.

  • S02E02 Evil in the Desert

    • June 22, 2017
    • Travel Channel

    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.

  • S02E03 Spirits in the Forest

    • June 29, 2017
    • Travel Channel

    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.

  • S02E04 Forest UFOs

    • July 6, 2017
    • Travel Channel

    An alien abduction and strange encounters with a humanoid monster in Apache-Sitgreaves National Forests point to a longtime extraterrestrial presence in the area. Are aliens using the forests to monitor nearby nuclear weapons facilities?

  • S02E05 Subterranean Secrets

    • July 13, 2017
    • Travel Channel

    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.

  • S02E06 Demonic Demonion

    • July 20, 2017
    • Travel Channel

    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.

  • S02E07 Cosmic Gateway

    • July 27, 2017
    • Travel Channel

    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. These and other bizarre encounters suggest the park may be a portal between our world and a distant star system.

  • S02E08 Without a Trace

    • August 3, 2017
    • Travel Channel

    One of America's most beloved wilderness areas, Yosemite National Park, has a dark side. Experts believe the ghost and UFO sightings, mysterious disappearances and a prehistoric pterodactyl are caused by a rift in the fabric of time.

  • S02E09 Deadly Waters

    • August 11, 2017
    • Travel Channel

    The shimmering waters of Crater Lake National Park captivate visitors, but they may also be the epicenter of dark, sinister forces from Native American lore that lure visitors to their deaths, conceal a terrifying monster and produce ghostly apparitions.

  • S02E10 No Man's Land

    • August 17, 2017
    • Travel Channel

    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.

  • S02E11 Creature Carnage

    • November 14, 2018
    • Travel Channel

    Visitors to Great Sand Dunes National Park have been seeing strange lights there since the 16th century, but in recent decades, animal mutilations and other bizarre incidents may be evidence the area is a gateway for an alien civilization.

  • S02E12 Reptoid Conspiracy

    • November 14, 2018
    • Travel Channel

    Lassen Volcanic National Park is the center of a series of bizarre encounters with sentient reptiles known as reptoids; experts believe these beings are working with extraterrestrials to take over the human race using mind-controlled human agents.