And I can only say, that you should not stop in Poland, but travel a little bit more to north and... visit Lithuania
Vilnius is not so far from Poland, and also near Vilnius you can visit Trakai - google will tell you more about this amazing palace in the middle of the lake
I just had some German friends here today and helped to explore Vilnius - seems like thay are amazed with our little beautifull oldtown
We also have two big CACIB dog shows on August 5th-6th in Druskininkai - an amazing town (google also says a lot about it
)
haha, and yes, Brukne and all of her younger brothers (Girios dvasia family, living in Vilnius) also love guests sooooo much
We have an old town, protected by UNESCO and places like this: