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

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

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

Dubbed "Wistom" by locals, this abandoned factory is an urban explorer's dream.

Order “Proletariat’s Cutlet” at this communist-themed restaurant allegedly once visited by Lenin.

Come to this Polish museum to take a good, clean look at filth.

The coffin-shaped church was once home to monks who slept in coffins.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

An abandoned Jewish sanatorium is tucked within the woods of Poland.

A monument to Poland's famous alleged UFO abduction case.

This fairytale medieval church in Poland originally spent centuries in Norway.

The largest toy museum in Poland showcases Europe's history of childhood.

This tower in a small Polish village uses the power of a sacred bell to ward off mischievous weather spirits.

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

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

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

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

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

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

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

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

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

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

A huge wooden clock that is so beautiful its creator was forcibly blinded.