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

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

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

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

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.

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

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

A surrealist timepiece by the artist of melting clocks.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

This bridge was constructed from the rubble of the infamous Bastille.

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

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

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

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

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

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

This massive library holds what was once the largest book collection in the world.

Indents in the pavement are all that remain from a grisly death machine in Paris.

Ghosts of France's colonial past.

BDSM, 1930s Style.

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

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.