The woman who helped save 15th-century France was born in this humble home.

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

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.

Medieval Danse Macabre Fresco in Northern Brittany.

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

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

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.

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

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.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

This French anatomy museum greets guests with a skinless man, mid-shovel.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

This crack in France's seaside cliffs once hid a sinister secret.

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

One of the great treasures of Neolithic art lies within this carefully constructed pile of rocks.

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

Site of one of World War I's most horrific scenes.

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

Fighting the British and making game shows for over 150 years.

Natural mummies hidden in the crypt of a medieval French church.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.