Just got back from Poland. It was a family trip and we rented a cottage near the Ojcow National Park. There are loads of caves in the area. In the main they are fairly small and horizontal in nature. There are a number of topos (surveys) to be found at
http://www.sktj.pl/epimenides/jura_p.html
I don't speak Polish much beyond the confines of my phrasebook. However Jaskinie means cave and you can take it from there!! I found the best approach was to try and find a cave on the map and then find it the list at the website. The book shop next to the city museum in the main square in Cracow sells loads of GPS compatible maps for around 10 Zl which is less than £2 (you will find prices in Poland very competitive compared to the UK). I understand that you need a permit to adventure cave in the Ojcow Valley, but I don't know how you obtain these.
All in all I would certainly recommend a trip to Poland to do some exploring (Easyjet a long weekend). There is also a lot of climbing on the limestone cliffs. This is very varied in grade but much of it is pre-bolted. Again if you search the net there are some topo guides, but you could just try on-siting stuff. I suppose it depends on wether or not you are into ticking or exploring.
The Salt Mines are definately worth a visit, but make sure you ask for an English tour whenyou buy your ticket.