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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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

Reminders of the Battle of Berlin still scar the railway.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

A fascinating insight into daily life in the Eastern Bloc.

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

Metro station with a claim to rock n' roll fame.

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

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

This replica of Columbus's famous ship houses the history of La Palma's maritime importance during the Age of Exploration.

These wooden balconies that are both decorative and functional.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

The world's largest wooden structure.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

This mine is home to the largest man-made hole in Europe.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

This abandoned viewing platform has become a monument to unnecessary government spending.

This architectural oddity is an oasis of green on the outskirts of Valencia.