Dedicated to the history and culture of smoking, this small museum now includes a vape lounge.

A modern-day Lascaux cave underneath Paris.

An odd museum dedicated to French fakes.

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

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

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

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

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

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.

One of the oldest masonic museums in Paris.

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

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.

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

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

BDSM, 1930s Style.

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

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

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

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

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

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

This statue was given to France by the United States to commemorate the centennial of the French Revolution.