A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

A wartime promise becomes a shrine to Our Lady of Lourdes.

This impressive chasm is one of the longest natural underground cavities in the world.

Historic medieval fortified city in southwest France.

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

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

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

On the coast of Sardinia, a once-great mining village is finding new life as a coastal resort town.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

A little sculpture with a large wardrobe.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

This demon atop the Notre-Dame de Paris looks utterly bored.

The Sun King's military models, saved from the Louvre.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

The Church of the Annunciation was carved into the face of a cliff, just like the rest of the town of Haute-Isle.

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

A French museum of wrought iron.

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

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

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

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

On this romantic tidal island reachable only at low tide the tomb of a famous French writer overlooks the sea.