Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

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

Shattered columns and Egyptian pyramids outside of Paris.

18th century underground pilgrimage site, dedicated to a Saint that did something...

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

Home to the "Rat King" of Nantes and other wonders of the natural world.

His "Lionheart" is entombed separately from the rest of his body.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

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

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

The construction of a tram line unveiled hidden remnants of the old medieval city.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

A medieval church with largest and oldest collection of Renaissance frescoes in France.

This bridge was constructed from the rubble of the infamous Bastille.

The encased skull that is widely believed to belong to St. John the Baptist.

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

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.