A miniatures park with a model of Wolf's Lair as it looked during World War II.

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

The first, and perhaps only, monument dedicated to Wikipedia.

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

A small granite monument marks where the borders of three countries meet.

One of only two places in the world where two rivers cross each other without the waters mixing.

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

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

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

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

These massive moving sand dunes have swallowed an entire village and are still on the run.

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

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

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

The site of the first battle of World War II.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The two abandoned overpasses are among the largest bridges in Poland.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

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

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

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

Rare karst landscape eroded from a flat seabed.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

This haunting location was featured in the final scene of a classic spaghetti western.