The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

A phantasmagoric tomb honors a Belgian artist-scientist's contributions to the world of spooky entertainment.

Indents in the pavement are all that remain from a grisly death machine in Paris.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

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

The personal library of the founder of modern neurology is open to visitors.

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

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

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

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

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

A museum of magic with a Sadist past.

For more than a century, revolutionary graffiti has marked the wall of a Parisian church.

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

This banal Parisian entranceway is not what it seems.

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

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

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

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

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

A museum which takes visitors to the côté obscure of Paris.