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

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

The Argonaute submarine was the French navy's pride and joy in the 1950's.

An odd museum dedicated to French fakes.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

A curious collection of locks and keys.

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

An unusual number plate signifies the building's saucy past.

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

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

A museum which takes visitors to the côté obscure of Paris.

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

The personal library of the founder of modern neurology is open to visitors.

One of the oldest masonic museums in Paris.

A modern-day Lascaux cave underneath Paris.

The Sun King's military models, saved from the Louvre.

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

BDSM, 1930s Style.

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

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.

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

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.