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

An artificial hill and apparent calendric structure built in the Early Middle Ages immortalizes a legendary Polish princess.

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

Old cabin-like homes in a rural community untouched by time are known for their vibrant and colorful window shutters.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

The shattered remains of the world's once tallest structure.

This unique railroad museum secretly contains the history of Poland rebuilding itself from the inside-out.

A hidden art gallery in an abandoned Warsaw fort.

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

A statue honors the children who fought Nazis in Poland.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

This hidden collection of everyday objects illustrates life within communist Poland.

Warsaw's fantastically preserved gasworks...almost.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A 20th-century picture show in 3-D.

Ruins of a late 1950s Polish ski jump ramp in the middle of the city.

A national collection of Communist-era musical posters.