An odd museum dedicated to French fakes.

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

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

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

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

The narrowest street in Paris.

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.

This banal Parisian entranceway is not what it seems.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

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

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

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

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

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The first green space constructed on an elevated viaduct.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

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

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

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

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

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

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