The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Naturally formed rock city in Poland.

Real bones which are said to have belonged to a Polish dragon.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

A larger-than-life statue of the German revolutionist stands proud in a small town where he never lived.

A Cold War secret surveillance tower used to spy on radio communications.

An unusual bronze bus shelter is actually an art installation commenting on the city's history with the Nazi party.

An enormous and lavish Gothic church in Czechia.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

Tiny communists hammer away on the Olomouc Astronomical Clock.

A surreal statue honoring Prague's favorite literary son.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

The oldest garden in Prague, once part of an medieval orchard.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

An Orwellian sculpture with eyeball cameras watches passersby.