This innocuous-seeming building is actually the remnant of a major wartime brothel.

Saintly bones pressed into a wax effigy of a Catholic superstar.

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

This banal Parisian entranceway is not what it seems.

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

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

This little-known relic crypt holds stolen parts of a Roman Empress.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

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

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

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

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

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

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

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

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

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

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

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

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

The curious underground history of keeping Paris clean.

A unrivaled and rather horrifying collection of wax dermatological models.

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