The storefront of a ramshackle Parisian puppet theater.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

The video game-themed street art first popped up in the French city.

This Parisian café is dedicated to great tea and the art of knitting.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

What looks like a normal building is really a hollow facade hiding a subway vent.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

This Parisian gem is one of the most incredible ethnographic museums in the world.

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

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

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

Former hunting lodge of a duke who was an avid collector of impressionist works.

Experience architect Le Corbusier's modernist design for living in the home he designed for himself.

A modern-day Lascaux cave underneath Paris.

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

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

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

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

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

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This museum houses an imposing skeleton army comprised of creatures great and small.

France's national museum of scientific and industrial instruments.

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