Men and special assistants stand by the road to sell the day's catch in this lakeside village.

This abandoned but well-preserved Prussian fortress sits abandoned in a Polish forest near the German border.

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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Colorful and chaotic stacked hotel in North Holland.

A massive mammoth bone has been on display inside this church since the 18th century.

An extensive network of secret tunnels was created for the Nazi project "Riese."

Disturbing works of outsider art, carved from whole logs.

A bronze replica of an elm tree that honors the victims that perished in Pawaik Prison.

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.

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

Hundreds of notes give thanks to the patron saint of lost causes.

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

Modern art commemorates one of the first military actions of World War II.

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

The site of one of the largest prison escapes of World War II.

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

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

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

These rare statues are one of the few remaining material witnesses to Old Prussian culture.

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

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

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