During the last ice age several glacier shoals formed on the summit of the Großer Arbers. As the temperature rose, the glaciers began to slide. On their way to the valley they notched the bed of the Great Arber Lake. Thanks to this glacier work, you can enjoy the picturesque mountain lake on a circular walk today.
At the beginning of the Ice Age was in place of the Great Arbersees the valley of the Seebachs with little inclined slopes. During the last glacial period, frost and glacier movements created the steep sea wall and the basin of the Karsees.
The imposing Arberseewand with its marsh wells, rock cascades and small waterfalls houses one of the most impressive jungle remains of the Bavarian Forest.
In the steeply sloping terrain occasionally even snow and ice avalanches go off. Lean tree populations of sable-growing maples and beech trees bear witness to this. On the western edge of the Arbersee, below the sea wall, about 2 ha of water surface are covered with vibrating turf.