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

This hidden workshop is filled with molds of France's most iconic sculptures.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

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.

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

France's most famous cemetery, with some of its most curious tombs.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

This coffee shop lies hidden beneath a historic church.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Eclectic final resting place of the controversial explorer.

The Egyptian-inspired last resting place of Lord Kilmorey.

"The Most Wonderful Wonder that ever appeared to the Wonder of the British Nation."

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

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

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

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

The site where two doves fell in love.

The heaviest gold coin ever minted.