Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

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

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

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

A unrivaled and rather horrifying collection of wax dermatological models.

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

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

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

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

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.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

Abandoned railway line circling the city of Paris.

A surrealist timepiece by the artist of melting clocks.

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

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

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A museum of carnival attractions where you are invited to ride the rides.

Notorious artist squat renovated into legal studios.