This 1920s Dutch barge is now a floating bookstore.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

Inside a former cabaret, seven floors of erotic art.

Weird wax anatomical models reside here, as do other anatomical specimens.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

A French artist's vague warning hangs over Belleville.

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

This bridge was constructed from the rubble of the infamous Bastille.

This banal Parisian entranceway is not what it seems.

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

The oldest and smallest cemetery in Paris is only open to the public twice a year.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

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

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

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

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

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

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

A modern-day Lascaux cave underneath Paris.

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

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

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

A subterranean shelter remains intact under a busy Paris railway station.