In August we went to Sosnowiec, a mining town near Katowice. It's sizable, but very industrial and I didn't actually see a lot of it. I hear it's basically just a mining town (think of a European New Jersey.) The train station was kind of nice.
Besides that, I didn't go very many places outside of Warszawa. I did explore more of Warszawa, and found some places I never knew existed. It really is a nice city.
Anyway, I'll be returning to Poland soon, and more tales to come (as well as more updates.)