The site of slaughterhouses that once satisfied Parisians' taste for horse meat is now home to a park and book market.

A phantasmagoric tomb honors a Belgian artist-scientist's contributions to the world of spooky entertainment.

A giant silver apple a day keeps the perils of capitalism away.

Executions were once held near this beautiful 18th-century fountain.

For more than a century, revolutionary graffiti has marked the wall of a Parisian church.

The site where two doves fell in love.

This small, ingenious cannon once helped regulate Parisian life.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

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

The storefront of a ramshackle Parisian puppet theater.

A museum dedicated to linguistics, from how babies learn to talk to endangered and extinct languages.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

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

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

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

An odd museum dedicated to French fakes.

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

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

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

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

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

A modern-day Lascaux cave underneath Paris.

The curious underground history of keeping Paris clean.