A wunderkammer of gold and silver reliquaries and ancient saintly bones.

This 135-year-old weather station studied the effects of the climate on human health.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

The 19th-century ruins hide deep in an overgrown forest.

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

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

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

A monument to the man who almost killed Hitler.

A restaurant and observation deck built in a unique broadcasting antenna.

Berlin's old airport.

Super-heavy Nazi architectural experiment.

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

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.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The "Prussian Versailles" that is as glorious today as when it was built.

A quaint Russian village in the middle of a German metropolis.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

The last king of Poland was interred in this church nearly 200 years after his death.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

Special benches that play Chopin's music are scattered throughout his native city.