The oldest wind turbine in Europe, constructed by a group of friends in 1932.

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

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

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

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

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

This antique thermometer honors the creator of the first universal temperature scale.

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

This mysterious and once-grand memorial still embodies a remarkable architectural vision.

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.

The hollow trunk of this 650-year-old tree was used as a hideout by two Jewish brothers during World War II.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

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

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

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

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

Poland's oldest salt mine has nearly everything one needs to live underground forever.

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

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.

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

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.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.