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

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The oldest stone house in Paris was built by its most famous alchemist.

Amsterdam's former hotspot for public executions and dissections.

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

Gruesome statues of people reborn in Buddhist hell stand among the ruins of an 11th-century sanctuary.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

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

A saintly relic hidden in a Prague church basement.

A Jenga-style cylindrical tower of books that appears to go on forever.

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

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

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

A hidden art gallery in an abandoned Warsaw fort.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

Weird wax anatomical models reside here, as do other anatomical specimens.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

One of the best collections of wax anatomical models in the world.