The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

Dedicated to the unsung history of human waste.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

The hidden lair of an alchemist rediscovered in a 2002 flood.

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

Venice's "Island of the Mad."

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A reproduction of earth's many biomes.

The original "capsule building" is a masterpiece of Metabolist architecture.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Cat art as far as the eye can see.

Experience park where visitors are told to expect the unexpected.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A surreal museum of extraordinary industrial objects.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A strange house built only at night, with rumored mystic inspiration.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.