Posted: 2006-08-03 06:18:00
You'll find Polish Railways official timetable here: www.pkp.pl (there is an English version available).
The question what to see/ not to see can't be answered unless you share your interests with us - then I could suggest some options.
E.g. if you want to hang around in cities, I'd highly recommend Gdansk, Torun, and Krakow in Poland, but if you'd rather do some hiking in the countryside the suggestions would be somewhat different (although Krakow is a must in any case), but again this depends on what your likes and dislikes are (in any case I'd recommend Gory Stolowe in Poland - unusual rock formations on the way from Gdansk to Prague). But there are other interesting places in Poland too, like high sand dunes just by the Baltic Sea, the Zakopane area (Tatra mountains), and much more. 3 weeks are too little for Poland alone, let alone other countries ;-)
If you need further info on Poland, drop me a line and I'll try to help you out.
vik, Gdansk, Poland