This demon atop the Notre-Dame de Paris looks utterly bored.

A Belle Epoque bordello turned into a themed love hotel.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

A font of vintage porn on the silver screen.

Inside a former cabaret, seven floors of erotic art.

The largest medical and anatomical collection in France lies hidden from the public.

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

The celebrated eyesore created by starry-eyed sweethearts.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

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.

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

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

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

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

BDSM, 1930s Style.

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.

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

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

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

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

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