The Rhine Valley - Germany. Better is between Cologne and Mainz. Best is between Koblenz and Rudesheim. This is the Katz castle by the famous Lorelei Rock. Go during wine festival season in September. Take a night cruise to see the Burning of the Rhine.
Burg Rheinstein is a very beautiful Castle with a very natural landscapes and there is over the Hill and under there is an extraordinary River. This Fort is located near Trechtingshausen in Rhineland Palatinate, Germany.
Eltz Castle- Burg Eltz is a medieval castle nestled in the hills above the Moselle River between Koblenz and Trier, Germany. It is still owned by a branch of the same family that lived there in the century, 33 generations ago.
The Mouse Tower (Mäuseturm) is a stone tower on a small island in the Rhine, outside Bingen am Rhein, Germany. The Romans were the first to build a structure on this site. It later became part of Franconia, and it fell and had to be rebuilt many times.
Hohenzollern Castle (German: Burg Hohenzollern) is a castle about 50 kilometers mi) south of Stuttgart, Germany. It is considered the ancestral seat of the Hohenzollern family, which emerged in the Middle Ages and eventually became German Emperors.