Hi, Dan! I don't know much about Jaworzno to be honest, but if it's near Krakow then you'll have lots of great time! Krakow is one of Poland's highlights and other places in the area worth seeing are Wieliczka Salt Mine (maybe you've already been there?), Beskidy, Pieniny and Tatra Mountains (they are all different from each other), and a bit further east - Lancut, Sandomierz, Baranow Sandomierski - small towns with long history and either with a lovely old square or a sort of a palace, and Lezajsk (in March lots of orthodox Jews from all over the world come to visit a grave of one of their famous religious leaders). If you're into history you might like "Szlak Orlich Gniazd" (the Route of Eagles' Nests) - several castle ruins in a beautiful hilly setting. And there's also Czorsztyn, and Niedzica, and probably lots of other places I'm not even aware of

I guess you can find something interesting here: http://www.poland.gov.pl/?command=languages/do_choose&language_id=en
I hope you'll like Poland and enjoy your work. I wish I lived anywhere near Jaworzno so that we could meet sometime
Take care and have fun! Cheers! Gosia