A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's most famous cemetery, with some of its most curious tombs.

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

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

An enormous and lavish Gothic church in Czechia.

A church of bones, decorated with 40,000 human skeletons.

Two stunning 17th-century libraries and a cabinet of curiosities.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

Countless grotesque faces stare out from this eerie Prague art wall.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This automated sculpture of two men peeing will spell out text messages with their micturition.

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

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Looming communist pillar with a Czech twist.

Monument to a suicide protesting the Soviet invasion.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

Single runway interrupted by a busy road that cuts across its middle.

Three bridges and one giant canyon make up this fantastic Spanish settlement.