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

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

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

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

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

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

An odd museum dedicated to French fakes.

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

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

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

Saintly bones pressed into a wax effigy of a Catholic superstar.

One of the oldest masonic museums in Paris.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

Dedicated to the art of hunting, with juxtapositions of contemporary art.

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

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

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

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

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

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The narrowest street in Paris.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

A series of abstract, silly sculptures represent the works of a great modern classical composer.