This precariously perched fortress was once ruled by a crow-worshipping baron.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

An abandoned village, frozen in time by the threat of a landslide.

Hidden by the roadside in the Iya Valley, this gem brings together folk monsters and the region's unique geography.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

A striped 12th-century basilica sits in the countryside of Sardinia.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Planes, trains, and automobiles have all been sunk as attractions at this Illinois diving spot.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

Originally slated to become a luxurious resort, this structure is now a graffiti haunt reclaimed by nature.

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

The fading, forgotten remains of a once bright and booming factory.

A former utopian healing center created by a huckster and built by derelicts.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Abandoned bridge hidden deep in the San Gabriel Mountains.