This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

The secret medieval communication system will whisk your words above the noise of the crowd.

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

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

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

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

The best place in the world to buy tinned fish.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

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

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

France's national museum of scientific and industrial instruments.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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