This curious fresh and salt water lake holds a secret that draws in deep divers from around the world.

One of the world's most advanced radio observatories sprawls across the Atacama Desert.

The intriguing personal collection of a professional demon-chaser.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

The world's largest collection of witchcraft regalia.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

Tropical paradise strewn with hundreds of World War II wrecks.

An ancient city exhumed from the depths of the ocean.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

An important Mayan religious and trading center dating back to 200 BC.

A one-of-a-kind collection of a unique medium.

This eerily opulent residential museum is home to a haunting local legend.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A self-built castle made by a mysterious man.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

The angel of death appears to weep black tears at this grave marker.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

One of the largest and oldest caravansaries in Persia.

A 1,500-year-old, 3-story subterranean city where ancient Persians took refuge in times of war.