This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

This 13th century Gothic brick castle is the largest in the world by surface area.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

The site of the first battle of World War II.

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

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

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

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

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.

This massive blockhead sculpture hides an entire library.

For over 300 years this little carving has been the city’s good luck charm.

This statue honors the thousands of Allied avians that served and died for France during World War I.

This emotive sculpture was originally created for the 1878 World's Fair.

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

A French museum of wrought iron.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

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

What looks like a normal building is really a hollow facade hiding a subway vent.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

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

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

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.