This mural painted by Keith Haring was done without payment as a gift to entertain the children at the Hôpital Necker.

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

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

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

A surrealist timepiece by the artist of melting clocks.

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

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

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

Paris' linguistic guide to the international language of, yes, love.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

A Milanese café entirely designed by the American director Wes Anderson.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

This poignant art installation raises awareness of violence against women.

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

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.