Wien, Austria
München, Bayern, Germany
Ingolstadt, Bayern, Germany
Regensburg, Bayern, Germany
Nürnberg, Bayern, Germany
Nuremberg Castle (Kaiserburg) is open daily from 9:00 am- 6:00 pm (April to September), and 10:00 am- 4:00 pm (October to March). It closed during some holidays.;
https://www.viator.com/Nuremberg-attractions/Nuremberg-Castle-Kaiserburg/d5628-a17863
Colmberg, Bayern, Germany
1000 yr old castle and it's a hotel!
https://www.tripsavvy.com/castle-hotel-colmberg-review-1520237
Rothenburg ob der Tauber, Bayern, Germany
fairytale town;
https://www.ricksteves.com/watch-read-listen/read/articles/germanys-fairytale-dream-town-rothenburg
Neuenstein, Baden-Württemberg, Germany
http://schloss-neuenstein.de/das-schloss/ Castle daily 10:00 - 12:00 13:00 - 17:30
Closed on Mondays (except public holidays or special arrangements)
Stuttgart, Baden-Württemberg, Germany
Zürich, Zürich, Switzerland
Luzern, Lucerne, Switzerland
Vaduz, Liechtenstein
https://www.tripsavvy.com/neuschwanstein-fairytale-castle-1520199
Ettal, Bayern, Germany
Innsbruck, Tirol, Austria
Salzburg, Salzburg, Austria
