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

Super-heavy Nazi architectural experiment.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

An old tram depot transformed into a vintage car paradise.

Antique frame collection with 2,400 frames.

A wunderkammer of mysterious objects and stories.

Terrifying derelict military hospital once housed a recuperating Hitler.

In a divided Germany, Potsdam's "central" train station was relocated to the city's southern suburbs to avoid West Berlin.

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

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

This giant sculpture made of trash is a critique of society's wastefulness.

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

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

Legends surround an ancient tree trunk riddled with nails for good luck.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

A silly medieval mural preserved on the side of a Viennese house.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

A spherical "micro-nation" in the heart of Vienna.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.