An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A terrific purveyor of natural history objects and curios.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

On Japan's Tashirojima Island, cats are king.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Historical Japanese-Dutch relations are honored with haunted rides and flower fields in this replica town.

The remains of the worst maritime disaster in the history of the "Graveyard of the Pacific."

Historic house-museum dedicated to the revolutionary gay graphic artist Tom of Finland.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The room where Vincent van Gogh died.

Marking the ancient boundaries of asylum around Beverley Minster.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

The decaying ruins of Wales' first asylum for the mentally ill.

Once a farm where patients tilled the soil, this asylum lost its workforce when overmedicating became common practice.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.