 Drachenfels Castle, 3 km west of the middle reaches of the stream, was destroyed in 1523, because part of it had belonged to the rebel knight Francis of Sickingen.The Berwartstein, still occupied and managed today, was once the possession of the knight, Hans von Trotha who, as "Hans Trapp" has been absorbed into local legend.The castle rises above the left bank of the Erlenbach over the village of the same name, whilst on the opposite hillside is the tower of Little France.