A statue honors the children who fought Nazis in Poland.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

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

A national collection of Communist-era musical posters.

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

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

A huge wooden clock that is so beautiful its creator was forcibly blinded.

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

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

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

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

An underground city of salt.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

An unsanctioned shrine that sprung up outside the late singer's home is causing a stir in London's Highgate neighborhood.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

The bronze uniforms commemorate the vital role of women during World War II.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

The medieval woodcut-style artwork chronicles life in medieval London.

This London marker celebrates the spot where the world-famous English band was founded.

Its collection includes a broad array of social, geographic, graphic design, and political history.