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

This prehistoric figurine is the oldest known realistic depiction of a human face.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

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

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

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

Folklore and history carved into Brittany's coast.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

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

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

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

Tens of thousands of ancient rock carvings hidden in the heart of a French national park.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

This otherworldly French waterfall looks like its waters have turned to stone.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

One of the world's most complex timepieces.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

Statue of a decomposing prince that once held his heart in its hand.

If they push on just the right spot, even the weakest person can move this titanic boulder.

The deserted pirate-themed restaurant still entices explorers.

The sunken structure looks like the victim of a catastrophic flood.