Untersee

The Untersee additionally called Lower Lake Constance, is the smaller of the 2 lakes that together shape Lake Constance and forms part of the boundary between Switzerland and Germany. The Lower Lake Constance measures 63 km² and is located approximately 30 cm lower than the Obersee. The Romans called it Lacus Acronius. In the Middle Ages, the Upper Lake became known as Bodamicus Lacus, or Bodensee in German. At a few point in time, this term commenced to consist of the Lower Lake, and a new term Upper Lake, turned into brought for the larger lake.

The particularly Swiss segment of the lake below of the Island of Reichenau and its southwestern arm is referred to as Rheinsee , now not to be burdened with Seerhein that is the Upper and Lower Lakes connecting phase of the river Rhine. This section of the lake follows extra or much less the border between Germany and Switzerland and is also referred to as Rhine Lake.