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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

The most visited, and possibly most controversial, museum in Germany.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Floating swimming pool within a moored vessel.

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

One of downtown Berlin's last reminders of its Communist past.

This massive monument honors the first human in space.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

Nearly three decades since the fall of the Soviet Union, the hero of the USSR still stands over Belarus.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

A well preserved medieval fortress in Vojvodina.

Kyiv's answer to Muscle Beach is a Soviet-era gym made from scrap metal.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

These temples are among the oldest free-standing stone buildings in the world.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.