Ominous sounds from the skies could be a sign of the impending apocalypse. Drivers are spooked by phantom headlights and ghostly hitchhikers along Alaska's haunted highways.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

An underwater alien base may be located off the coast of a quiet Alaskan town. A cannibalistic creature preys upon those brave enough to venture into the Alaska Triangle.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

Hostile Sasquatches leave the wilderness behind for Alaska's major cities. A paranormal investigator searches for evidence of ghosts at an infamous haunted hotel.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

The Alaskan skies are filled with unexplainable lights and objects, but incredible evidence suggests these extraterrestrial visitors are landing. Prehistoric monsters may be alive and well in the Alaska Triangle.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

A team of ghost hunters reaches out to the dead in an abandoned gold mine. Numerous sightings and strange disappearances suggest a fearsome Yeti inhabits the frozen landscape of the Alaskan mountains.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

Dark forces disrupt a paranormal investigation at an old fairground near Fairbanks, Alaska. Hundreds of Alaskans go missing every year. Is something otherworldly abducting them?

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

A ghost hunter seeks out spirits from the gold rush in Skagway, Alaska. Tiny demonic creatures may be behind thousands of strange disappearances in the Alaska Triangle.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

An incredible sonar recording may prove that a prehistoric monster stalks the seas surrounding Kodiak Island. Researchers investigate why thousands of airplanes have disappeared without a trace in the Alaska Triangle.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

A Sasquatch colony terrorizes the residents of remote Prince of Wales Island. Decades of UFO sightings on Kodiak Island lead many to believe that aliens are working with the US military.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.

A top-secret government facility beneath the Alaskan wilderness may be hiding an extraterrestrial pyramid. Strange forces within the Alaska Triangle are making wildlife more aggressive towards humans.

For even more of The Alaska Triangle, head to discovery+. Go to discoveryplus.com/alaskatriange to start your 7-day free trial today. Terms apply.