This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The curious underground history of keeping Paris clean.

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

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

The historic Masonic Lodge in which the first-ever female Mason was initiated.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

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

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

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

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

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

BDSM, 1930s Style.

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

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

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

Paris' fabled purveyor of exotic taxidermy and natural history curios.

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

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

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

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

Statue of death tucked in the University of Medicine courtyard.

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

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