For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This monumental work of art symbolizes the coming together of a previously divided city.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

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

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

Tiny memorials honor individual victims of the Holocaust.

Cold war icon and onetime "hole" in the iron curtain.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Once the home of a hermetic monk, this cave now houses a small church.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Four giant movable street lights decorate this modern Rotterdam square.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

The Netherlands' first car tunnel has an unusually rectangular shape.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Hear the quietest sound from across the dome.

An early 20th-century bullring converted into a modern shopping center.