This cave holds a surprisingly colorful variety of geological oddities.

A national collection of Communist-era musical posters.

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

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

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

These 18th-century paintings of Warsaw were used to reconstruct the city after World War II.

This extensive collection covers thousands of years of Polish military history.

An artificial hill and apparent calendric structure built in the Early Middle Ages immortalizes a legendary Polish princess.

This grubby wall is said to be one of the Earth's esoteric energy centers.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

Relive a Polish uprising via an enormous, century-old cyclorama.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

This 13th century Gothic brick castle is the largest in the world by surface area.

This antique thermometer honors the creator of the first universal temperature scale.

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

A memorial to the beloved brown bear that served in the Polish army during World War II.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

A striking public sculpture representing the period of martial law in Communist Poland.

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

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

The silly symbol for an underground protest group is now scattered around the city.

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

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