Rhenish Hesse, stretches from the Upper Rhine Plain on the west bank of the Rhine up to the Nahe and Alsenz rivers in the west and down to the mouth of the Isenach in the south. The region borders on the Rhineland in the northwest, on the Palatinate in the southwest, and on South Hesse beyond the Rhine. The Rhenish-Hessian Hills along the Selz river, also called the land of the thousand hills, reach up to at the summit of the Kappelberg and about in Rhenish-Hessian Switzerland.