The number of castles in the Upper Middle Rhine Valley is unique in the world, and they are the reason why this stretch of river was declared a UNESCO World Heritage site. On board KD you can relax and watch as all these fascinating buildings pass you by. Enjoy the view from the ship of Ehrenbreitstein Fortress and Stolzenfels Castle in Koblenz, the legendary castles Katz and Maus (Cat and Mouse), the medieval Marksburg Castle, which was never destroyed, Schönburg Castle near Oberwesel, the Pfalz in Kaub, or Stahleck Castle in Bacharach. Not a castle, but nevertheless a fascinating sight, is the legendary Loreley Rock.