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

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

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

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

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

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

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

A gruesome combat between a hunter and a furious momma bear.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

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

A poem by Arthur Rimbaud is inscribed on the wall of a street that, while it is only one block long, plays a key role in multiple novels.

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

The celebrated eyesore created by starry-eyed sweethearts.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

For more than a century, revolutionary graffiti has marked the wall of a Parisian church.

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

The narrowest street in Paris.

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

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

One of the world's oldest continually operating bookstores.

The author of Frankenstein is buried here, along with her parents and the heart of her husband, the poet Percy Bysshe Shelley.

War prevented this Polish composer's body from being returned to his home country for 51 years. Though his ashes eventually made it home, his heart stayed behind.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.