Your trip could be oriented into history and architecture of European Capitals. 

You can flight into Krakow, Poland. You can take a car/minivan/bus and travel through Krakow (Poland), Oswiecim (Poland), Banska Bystrica (Slovakia), Bratislava (Slovakia), Budapest (Hungary), Vienna (Austria), Prague (Czech Republic). You can have your own tour in every of city, and many places on the way. You can flight out from Prague.