Northern Hessen is a beautiful and under appreciated region of Germany, especially the Fulda, Werra and Eder Valleys.
The Castle Ehrenburg is one of the best preserved castle ruins on the Mosel, complete with a protected spiral entrance tower and dual-tower keep. Parts of the curtain wall and annex buildings have been restored or retain intact.
Trifels Castle is an important monument in the history of the German Romanesque, as (prior to its total reconstruction) it was among the best preserved Romanesque castles in Germany. Its also an easy hike from a train station hidden deep in the Palatine Forest.