The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

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

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

Inside this Krakow church, an explosion of psychedelic color.

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

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

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

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

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

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

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

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

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

Real bones which are said to have belonged to a Polish dragon.

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

Portugal's National Pantheon has a history of curses, collapses and financial problems.

A stairway to heaven, or to nowhere at all.

This wooden hotel is a temple to German sustainability and forest conservation.

Dine at a legendary after-hours joint frequented by David Bowie and Iggy Pop.

The original burial place of this preeminent 18th-century Jewish philosopher was razed by the Nazis.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

A monument to the man who almost killed Hitler.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.