Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

This unofficial museum details the rise and fall of Colombia's most notorious narcotrafficker, Pablo Escobar.

The Andean town where every single building is decorated with a brightly colored frieze.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

This tiny shop has been serving traditional tamales for more than 200 years.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

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

BDSM, 1930s Style.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

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."

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

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

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.

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

Statue of death tucked in the University of Medicine courtyard.

The history of radiation is on safe display at the foot of a radiation science laboratory.

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

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.