135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

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

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

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

This museum houses an imposing skeleton army comprised of creatures great and small.

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

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

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.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A haunting collection of the vanished and disappearing natural world.

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

The oldest stone house in Paris was built by its most famous alchemist.

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

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.