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

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

This massive library holds what was once the largest book collection in the world.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

This Parisian café sticks almost exclusively to an ethos of reuse.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Christ's blood allegedly preserved in a Belgian town.

Meet the bronze beloved pet to a family of famous peeing statues.

A bronze statue of the fictional character nicknamed "Mrs. Hat" from a beloved Belgian comedy.

Cozy basement bar sports an inventory of over 2,000 beers.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

A little sculpture with a large wardrobe.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

The Devil’s own choice when he needs a drink in Brussels.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

The first green space constructed on an elevated viaduct.

Abandoned railway line circling the city of Paris.