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

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

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

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

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

Europe's second largest ossuary wasn't discovered until 2001.

Mummified monks and the accidentally interred, in a 17th-century crypt.

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

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

A giant gorilla made of used car tires used to sit sentinel over a Helsinki college campus.

A mocking tribute to the past and modern leadership of Prague.

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

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

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

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

A haunting collection of the vanished and disappearing natural world.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.