The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

The oldest stone house in Paris was built by its most famous alchemist.

This Parisian café sticks almost exclusively to an ethos of reuse.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

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

An odd museum dedicated to French fakes.

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

A modern-day Lascaux cave underneath Paris.

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

One of the oldest masonic museums in Paris.

A subterranean shelter remains intact under a busy Paris railway station.

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

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

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

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 oldest and smallest cemetery in Paris is only open to the public twice a year.

Paris' linguistic guide to the international language of, yes, love.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

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

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

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.