An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

Its frescoes depict the likeness of Marshal Tito, Karl Marx, and Friedrich Engels burning in hell.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

Seven dragon statues—including one that breathes real fire—are scattered throughout the streets of Krakow.

Krakow's own version of the Hollywood Walk of Fame.

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

Inside this Krakow church, an explosion of psychedelic color.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

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

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

An artificial date palm stands as a memorial to Warsaw's Jewish community.

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

This bell stars in a tragic love tale and is said to make wishes come true.

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

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.

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

A statue honors the children who fought Nazis in Poland.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

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