One of the world's heaviest musical instruments towers within a popular urban park.

Celebrating the works of a beloved Italian actor, known for such cult films as 'They Call Me Trinity' and 'Watch Out, We’re Mad!'

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

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

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

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

A monument to the man who almost killed Hitler.

A statue of Vladimir Illyich Lenin guards this abandoned building in the "Forbidden City."

Several of these strange cone-shaped bunkers can still be seen around the former Nazi headquarters.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

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

This public observatory is home to the "celestial cannon," the longest pointable telescope in the world.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

This stone amphitheater was once part of Nazi Germany's plan to promote propaganda.

An abandoned swimming pool decays on the outskirts of Berlin.

The final resting place of many of Germany's most famous communists.

Twisted trees shaped by coastal winds make this woodland look like something from a spooky story.

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

A century-old shot ball factory tower is open to the public once a year.

"There's nothing there," and other lies the KGB told us.

An underground nightclub helped spark a "Singing Revolution."

This former medieval prison now unlocks Estonia’s rich photographic history.