A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

A popular swimming hole that hides one of America's most deadly diving spots.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

Radioactivity still cause for concern at this urban explorer's paradise.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Bioluminescent firefly squid light up this Japanese fishing port.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Exotic feline breeding compound and conservation center.