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

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

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

An underground city of salt.

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

People in Poland have rallied to save this unnatural desert from being reclaimed by the forest.

Museum dedicated to "the man who moved the Earth."

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

Modern art commemorates one of the first military actions of World War II.

The site of the first battle of World War II.

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

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

A World War II torpedo launch station abandoned off the Polish coast.

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

This hilltop ruin is of the hundreds of stone columns built in tribute to the first German chancellor.

Built to transport German U-boats through the never-completed Masurian Canal, the locks near this Polish village are now home to a rope course.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

A peculiar family mausoleum built by a German nobleman captivated by the occult.

One of the world's largest collections of medieval religious art.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

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

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

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

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