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

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

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

Boats must transform into railroad cars to navigate this Polish canal.

What was once an underground Nazi city is now Europe's largest bat reserve.

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

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

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

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.

A haunting deserted hotel is a favorite with artists and photographers.

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

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

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

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

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

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

Naturally formed rock city in Poland.

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

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

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

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

The site of the first battle of World War II.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

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