A curious collection of locks and keys.

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

A charming flea market shop dedicated to retrofuturistic apparati.

An antique curios dealer and hybrid taxidermist.

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

Weird wax anatomical models reside here, as do other anatomical specimens.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

The celebrated eyesore created by starry-eyed sweethearts.

The largest medical and anatomical collection in France lies hidden from the public.

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

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This 18th-century sundial was designed to calculate the date of Easter each year.

The final resting place of the "father of special effects."

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

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

The tomb of history's greatest potato promoter is surrounded by tubers.

A Parisian boutique devoted to la Sape, the elegant Congolese fashion subculture rooted in European colonization.

This demon atop the Notre-Dame de Paris looks utterly bored.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

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

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

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

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