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

A narrow strip of land is home to the tallest migrating dunes in Europe.

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

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

The reason for the strange contortions in the trunks of these "drunken" pine trees in Russia is still a mystery.

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

Built to transport German U-boats through the never-completed Masurian Canal, the locks near this Polish village are now home to a rope course.

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

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

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

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

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

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

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

The manor house where the Polish composer spent childhood summer holidays is now a museum and concert hall.

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