Abandoned medieval hill town.

America's only nuclear missile silo open to the public.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

From scholastic to sepulchral - now under reconstruction.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

All that's left of the quintessential "cabin in the woods."

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

A piece of outsider public art accompanied by a strange urban legend.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

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

One man's ambition created this psychedelic log home.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Abandoned bridge hidden deep in the San Gabriel Mountains.

The largest earthwork effigy in the world.

This attraction was abandoned after the Chernobyl disaster.

A reproduction of earth's many biomes.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.