Hi Chris, Hopefully, you'll get some advice from locals on lesser known destinations while you are there, but you definitely need to visit Krakow, at least two or three days plus a day trip to Auschwitz. Auschwitz can be emotionally draining so you don't want to plan to do too much afterwards. I'd also suggest an overnight trip to Zakopane which is a little resort town a couple hours south of Krakow in the Tatras Mountains. The mountains are gorgeous and there are walking trails for just enjoying the views to more rigorous climbs up into the mountains themselves. It's better to take the bus from Krakow to Zakopane rather than the train because, surprisingly enough, it takes less time and is more scenic. Also in Poland, I'd suggest Gdansk. I had thought it would be a dreary industrial town, but I wanted to see it because of its role in the history of the Solidarity Movement. But I was very pleasantly surprised by how beautiful it is as well. Another lovely city is Wroclaw which has almost as impressive a market square as Krakow's. If you have the chance while in that part of Europe, you should also try to see Prague and/or Budapest. They are both beautiful; Prague is like something out of a fairytale; Budapest has a "belle epoch" feel. Keep checking back in, there will likely be others with suggestions and more information on logistics. Have a great trip!