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

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

A fascinating insight into daily life in the Eastern Bloc.

Where once there was a train station bathroom, there is now this German burger joint.

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

A wunderkammer of mysterious objects and stories.

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

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

These megalithic tombs contain some of the largest stones ever moved in prehistory.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Founded in 670, this ancient mosque is an architectural time portal.

The best-preserved Roman small town in North Africa.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

The statue of a cursed knight is said to come to life every 100 years.

Monument to a suicide protesting the Soviet invasion.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This spooky statue sits outside a famous Prague theater.