An essential stop before plundering, BYO Cutlass.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

An obscure waterfall that looks like something out of a fantasy novel.

A castle built by an eccentric medieval enthusiast in suburban Ohio.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

A 140-year-old castle with underground caves hidden in San Francisco.

A mysterious light of unknown origin on the backroads of Missouri.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

Jail from the 19th century that was built by inmates.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A museum dedicated to the alleged Roswell Incident.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The private clubhouse for the members of the Academy of Magical Arts.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

A fake town founded by Western movie stars is now becoming a hip desert community.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The ruined remains of a coal mining ghost town are hidden within the woods.

Cadillac where country's first big star was found dead.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.