You wont miss this if you go to Warsaw. The communist Palace of Arts and Culture was built as a gift from the Soviet Union and was a much hated building during the years of communism by the Poles. I believe it's the tallest building in Poland but I could be wrong.
This was taken in Krakow. The building in the center is St. Mary's Basilica which is well known in Poland for it's bugle that is played every hour. The sound is always abruptly ended which commemorates a bugler who got a shot in the throat while warning of a Mongol invasion.




