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

This remarkable checkered church on a Corsican hilltop is fabled to have been built by angels.

Journey through the ruins of this ancient Roman temple dedicated to the god of war.

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

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

This historic stone gate tower is now just a lonely relic in the middle of a swamp.

This abandoned church in central Lyon is missing its front stairs.

France's highest manned weather station is the only one still inhabited by meteorologists.

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

A towering baroque basilica jutting out of the French countryside.

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

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

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

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

Medieval Danse Macabre Fresco in Northern Brittany.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

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

These ruins reveal the remarkably intact layout of a Roman marketplace.

This Corsican Neolithic site is full of pre-Roman megalithic structures that may or may not be penises.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

The remains of this castle, known as the Witch’s Eye, watch over the Thur Valley.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

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

This mountain trail inspired Nietzsche to complete his magnum opus.