A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

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

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

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

One of the oldest masonic museums in Paris.

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

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

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

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

Visitors dip into a variety of pools of what was once ice.

This splendid tomb may look fantastic, but there's nothing in it...

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

A font of vintage porn on the silver screen.

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.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

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

This innocuous-seeming building is actually the remnant of a major wartime brothel.

BDSM, 1930s Style.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

This magnificent Crimean estate was once a playground of the Russian elite.

Narrow-gauge railway with its own personal power grid.

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