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

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

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

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

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

This banal Parisian entranceway is not what it seems.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

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

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

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

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The curious underground history of keeping Paris clean.

A unrivaled and rather horrifying collection of wax dermatological models.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

How did a French journalist’s grave become the sexiest statue in the cemetery?

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

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

The first green space constructed on an elevated viaduct.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

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

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