These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Mysterious Spanish catacombs of unknown origins.

Christ's blood allegedly preserved in a Belgian town.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

The platform atop this verdant volcano was built with the help of a royal elephant.

One of the world's richest men bought this former paper factory and transformed it into a mall.

Prehistoric animals decorate this popular outdoor park.

A 12th-century Italian skirmish gets reenacted with 500,000 pounds of flying citrus.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

An unexpected and peaceful oasis on a hillside.

Nature is leading a successful mutiny on this century-old freighter.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

Once America's longest-manned military fort, now an abandoned hulk.

Scattered ruins and a tiny cemetery are all that remain of a failed attempt to colonize the inhospitable Desolate Islands.

An abandoned settlement originally established by British colonialists in the Andaman archipelago.

A newspaper editor turned this abandoned island into a tortoise nature preserve that's now the world's smallest national park.

This foolish Victorian sea fort was converted to a deluxe hotel.

This beloved marketplace mascot poops money and grants good luck.

This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.