Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

There has been an astronomical clock on this spot since the 14th century.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Sculpture of a legendary French dragon.

Walk through living pictures and music in the Cathedral of Images.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This tiny cafe is one of the last meeting places of its kind, allowing revolutionaries a place to plot.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

This massive blockhead sculpture hides an entire library.

This ancient theater was once the home of fierce gladiatorial battles.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

This little-known relic crypt holds stolen parts of a Roman Empress.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A surrealist timepiece by the artist of melting clocks.

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

Notorious artist squat renovated into legal studios.

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

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

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

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