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

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

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

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

A statue honors the children who fought Nazis in Poland.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

Museum dedicated to "the man who moved the Earth."

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

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

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

A historic, scenic mill that was forced to close due to overlogging.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

The crumbling remains of the first Black-owned and operated hospital in Kansas City.

This pristinely abandoned filling station on the edge of a graveyard is populated solely by unsettling mannequins.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

Another in a long tradition of legends regarding infernal seats.

An abandoned concrete jungle surrounded by a lush park.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.