Krakow is beautiful. Lots of history.
I probably wouldn’t have said it a few years ago, but Warsaw is actually becoming a decent city to visit, it has changed so much in just the past few years, especially since they co-hosted the 2012 Euro tournament.
A LOT of history there, nice parks, modern buildings mixing with the old Socialist architecture. It’s quickly catching up with Krakow.
And when you see the film of what Warsaw looked like before the war, it will make you hate Hitler all that much more, he destroyed what was one of the most beautiful cities in Europe, and also the Communists for replacing it with their architectural monstrosities.