See the best of West Germany's castles with this itinerary. It starts in Koblenz's Festung Ehrenbreitstein and moves through the three castles in the St. Goar region and the academic treasures of Heidelberg, before finishing at the castle-hotel in Neckarzimmern, the Burg Hornberg. This trip offers some of Germany's best castles, with plenty of local wine to make the learning fun.