Poland

Warrszawa, Pałac Kultury i Nauki

The Palace of Culture and Science in Warsaw in the tallest building in Poland and was completed in 1955 as a gift from the Soviet People, it was originally named after Soviet dictator Joseph Stalin.  The building offers wonderful views of the city and today holds various office buildings, a university, at least two museums, a swimming pool, and a variety of theaters.  Warsaw's Hard Rock Cafe is located just down the way from the building.

On a personal note, it is literally my father's least favorite building in Warsaw, if not all of Poland.