Visit three impressive polish castles on a route known as the trail of the eagles nest a stretch of forested countryside in the krakow czestochowa upland lined by fortresses after leaving krakow travel along the trail and stop to explore three of the areas must visit castles with a guide hear tales of casimir iii the great at ojcow castle admire renaissance architecture at pieskowa skala castle and explore the vast ruins of ogrodzieniec castle