Explore an eerie, abandoned medieval citadel.

A towering baroque basilica jutting out of the French countryside.

This 12th century, partially destroyed, abbey has had several owners and was seized during the French Revolution.

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

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

A resort destroyed by a mysterious bombing offers visitors only its remains and the riddle behind it's demise.

The castle where the Marquis de Sade lived out his darkest fantasies.

The precise origins of this pink sandstone temple are unknown.

The ruins stand as a somber reminder of France’s worst civil catastrophe of the 20th century.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

A medieval house adorned with enigmatic carvings, including one of a man displaying his masculine attributes.

This French chateau is home to the world’s largest private collection of fighter jets.

This striking fort on the Maginot Line looks just as it did after being destroyed in the Fall of France.

Now a memorial, this factory was once used as a concentration camp for artists by the Vichy government.

The site of the first medieval crusade that pitted Christians against Christians.

An astounding collection of taxidermy, fossils, skeletons, and even a few strange live beasts.

Half a century after it was abandoned, this ghost town is coming back to life.

Exquisite examples prehistoric bas-relief carvings.

French Time Capsule-19th Century home revealed to the public.

The eclectic observatory castle of a 19th-century astronomer and explorer.

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.