These 13th century documents come housed in 18th century shelves organized by a 19th century historian.

Naturally formed rock city in Poland.

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

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

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

An unusual cave filled with rare alien-looking aragonite formations.

This symbol of Polish heritage survived the occupation during World War II, hidden in plain sight.

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

The relics are stored in a silver reliquary, where they can be seen through glass.

Record-holding coffin moonlights as an eatery run by undertakers.

A striking public sculpture representing the period of martial law in Communist Poland.

The silly symbol for an underground protest group is now scattered around the city.

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

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

An underground city of salt.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

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

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

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

A statue honors the children who fought Nazis in Poland.

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.