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

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

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

Since ancient times these picturesque springs have been providing bathers with healing waters.

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

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

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

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

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

An icy lake tucked among jaw-dropping alpine panoramas.

One of the greatest maze designer’s greatest mazes.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

A museum of magic with a Sadist past.

France's national museum of scientific and industrial instruments.

A haunting collection of the vanished and disappearing natural world.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

A unrivaled and rather horrifying collection of wax dermatological models.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.