This mosaic-covered bar is brimming with curated curios.

Got apples?

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

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

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.

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

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

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.

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

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

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

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

A unrivaled and rather horrifying collection of wax dermatological models.

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

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

Statue of death tucked in the University of Medicine courtyard.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

Fittingly, America's museum of architecture is itself a magnificently designed old building.