Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

This 5,000-year-old tomb once had its own hinged door.

The celebrated eyesore created by starry-eyed sweethearts.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

This emotive sculpture was originally created for the 1878 World's Fair.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The narrowest street in Paris.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

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

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

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

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.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A mechanized clock where a man fights off a dragon, crab, and rooster.