Krakow's own version of the Hollywood Walk of Fame.

This grubby wall is said to be one of the Earth's esoteric energy centers.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

Brought to you by the makers of fiberglass dinosaurs.

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

An underground city of salt.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Atop this former dutch railway office sits an interstellar work of art.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

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

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