The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

Smack in the midst of coal country, this collection provides a peoples' history of Appalachian miners' heritage.

An abandoned 1920s school with a mysterious history.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This abandoned school has had many lives since the early 1900s, and all of them doomed.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

Bizarre Cavern.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Ship skeletons haunt Baltimore's waterways.

A remote horde of architectural treasures fit for Indiana Jones.

This abandoned sea fort has become an accidental bird sanctuary.

This former asylum for Black Americans is haunted by its history of violence and racism.

The underground sanctuary of a mysterious ancient Roman religious cult contains an exquisite traditional fresco.

A spiritual sanctuary in a natural cave.

Italian cave with exceptional acoustics and an unsavory history.

An eccentric home in Sicily turns heads on a regular basis.

An abandoned building that once tightened a power line that stretched across Messina Strait.

The world's most active stratovolcano is almost always erupting.

This constantly evolving art space saved an Italian town from its own crippling reputation.

A madman's personal garden filled with 1,000 sculpted heads.

This amazingly preserved Doric temple was abandoned before it was ever completed.