If you visit the burial place of King Frederick the Great, you'll likely find a couple of potatoes sitting on his tombstone.

The "Prussian Versailles" that is as glorious today as when it was built.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

One of Jeff Koons’s largest sculptures and his first commemorative work.

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

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

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

A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.

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

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

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.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

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

The remains of a convent turned military barrack in the heart of Madrid.