If you're into walking / trekking the mountains south of Krackow are wonderfull. Well worth a visit. Although August and early September are school holiday season!

I've lost the link for now but have an excallant hotel there, although is probably fully booked. PM me if needed and will make a note to find it and come back and add to the post.

In WAW, the above quote about best place to see WAW is from the Palace of Culture is still true today. Be carefull the attendants downstairs aren't always overly helpful, it is worth the lift to the top. Also in WAW in the old town, watch out for tourist trap restaurants. There are two large squares ione after the other. One has restaurants all round, one just has them on left-hand side as you walk into it from the previous square. I would skip the places in this second square, they're ok but not worth the prices. Realise the 'directions' are a bit cryptic but don't have a street map to hand, should make sense one you are there.

Agree with previous posts re time, 2-3 full days in WAW is fine.