A small etching on the white marble parapet was written in runic script by a Viking mercenary.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

A stunning Art Nouveau cinema in the heart of Budapest.

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

An underground city beneath Krakow's postwar socialist utopia.

Remnants from a time before electricity.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

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

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

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

Warsaw's fantastically preserved gasworks...almost.

These plaques found across Warsaw commemorate the sites where executions or battles took place during the German occupation.

Atop this library is one of the most beautiful green spaces in Warsaw.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

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

A Soviet era flat that refused to conform to the dull gray standards.

Down this Cracovian street resides a plaque with a stark message about the city's air pollution.

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

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

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

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

At night, this memorial illuminates a ghostly outline of a footbridge that connected two sections of the Warsaw Ghetto.

A statue honors the children who fought Nazis in Poland.