Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

A toxic ghost town sitting atop a massive coal fire.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

According to local myth this cemetery is half evil spirits, half good—split down the middle.

The Home and murder site of the witch of Rehmeyers Hollow.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

An outlandish shoe shaped house built by an eccentric millionaire.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

Secret Swing.

A six-story-tall golden pyramid, surrounded by a moat.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

A former suicide bridge is now accumulating symbols of love instead of a body count.

Buddha and Jesus tower over this French mountainside headquarters of the Aumism religious cult.

This was once the center of the Birdman cult, and is now a World Heritage Site.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

Mysterious craters may have been home to an ancient cult.

Morocco's Argania trees are infested with nut-hungry goats.

World's largest herd of white deer populate a former U.S. Army depot.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.