This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

The evocative ruins of a medieval village.

This church looks more like a spaceship than a house of worship.

A once drab public housing estate is transformed into a colorful gallery of trompe l’oeil murals.

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

Home to fantastic views and ancient graves.

The remains of this ornate chapel now act as a portal to a cramped French cemetery.

This massive sculptural work outside of Paris was four decades in the making—and it's still not quite complete.

France's third-largest necropolis offers a peaceful respite from a busy port city.

This stunningly massive housing complex is a go-to filming location for dystopian sci-fi cinema.

A massively oversized measuring tape sculpture sits inside a hidden yard.

The shape of this old salt factory complex was inspired by the course of the Sun.

Every half hour, the flow of this unusual spring cycles between a rush of water and barely a trickle.

This impressive chasm is one of the longest natural underground cavities in the world.

French sculptor Paul Moreau-Vauthier transformed the site of a 19th-century massacre into a haunting memorial.

The smallest port in France is named after the pirate who created it.

The experimental test tracks of a retro-futuristic monorail still stand in the French countryside.

Peruse produce from Senegal, Cameroon, and other West African nations at this sprawling market.

Today this former Nazi concentration camp stands as a poignant memorial to the victims of fascism, and a warning from history.

Dishes are packed with flavor at one of the only Singaporean restaurants in Paris.

A functioning Roman-era aqueduct and bridge in rural southwest France.

This former limestone quarry is now a subterranean wonderland of grand stonework.

A medieval church built into an ancient cave.

A sandstone block marks the alleged spot where the legendary writer was conceived.