Atop this library is one of the most beautiful green spaces in Warsaw.

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

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This man-made mound monument was built out of soil from all across the Polish empire.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A diminutive statue that was inspired by the sculptor's own daughter.

This sculpture honors the man who was known as the "Righteous Among the Nations."

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

The world's first combination ski slope and power plant.

A collection of noses tucked inside an art museum reveals how times have changed.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

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