Enormous sandstone towers loom within a Czech forest.

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

Gliwice Radio Tower, likely the tallest wooden structure in the world.

This towering statue of Jesus provided internet to the surrounding area.

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

This imposing 20th-century castle was abandoned before it was ever completed.

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

The site of the first battle of World War II.

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

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.