The southern Werdenfelser Land is bordered by the Wetterstein Mountains and the Karwendel. The Zugspitze lies southwest of Garmisch-Partenkirchen and, at sea level (NN), is the highest peak in Germany. Both the valleys and the Alpine Foreland have been heavily influenced by the last ice age. The lakes were partially formed by groundwater filling the hollows carved out by the glaciers. Later the lakes silted up and formed moors like the Murnauer Moos.