What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

15,000 year old bison sculptures.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

A French library that makes sure its love of books is writ large... giant in fact.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

A modern-day Lascaux cave underneath Paris.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Artist Danielle Jacqui decorates nearly every inch of her home inside and out with her work.

This otherworldly French waterfall looks like its waters have turned to stone.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

Statue of a decomposing prince that once held his heart in its hand.

If they push on just the right spot, even the weakest person can move this titanic boulder.

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

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

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

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This massive blockhead sculpture hides an entire library.