I'm just gonna list places in order of appearance

Vienna
Berner Oberland (Switz.)
Fussen (Neuschwanstein, Ehrenberg, other castles)
Munich (Dachau)
Romantic Road (Rothenberg)
Rhine and Mosel Valley (castles, rivers, and stuff)
Berlin
Bremerhaven (have family friends there)
Amsterdam :whistle:
Possibly Brussels or Bruges if I have time

and there it is..ba da boom ba da bing