The site of the first battle of World War II.

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

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

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

A collection of old neon signs from all over Poland line a secluded courtyard.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

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

The site of one of the largest prison escapes of World War II.

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