Krakow / Poland should definitely be on the list- Krakow Balice airport pick up by Balic airport taxi is 90 PLN (roughly 20 EU) but you can get it even cheaper if you use FreeNow app.
Public transport is reliable and cheap as well - there is no tube, but buses and trams operate frequently. Besides, if ypu're stayin g the old town area, you will not really need to commute- since KRakow is a compact city, everything is at hand