A magnificent castle, one of the most beautiful in Germany. Highly recommended. The guided tour is also well-done. The castle is privately owned, by the way; a family lives there.
The Elz is a creek about 60 kilometers long on which the fantastic castle is located. You can hike the Elzbach from its source to its confluence with the Moselle.
In some places the Baybach's notch valley is only very narrowly cut through the slate rocks, so that the path following the stream has to overcome some rocky passages and is secured there with ropes.