The Chiemsee is a freshwater lake in Bavaria, Germany, between the towns of Rosenheim and Salzburg. It is often referred to as the "Bavarian Sea". The rivers Tiroler Achen and Prien flow into the lake, the river Alz out of it. The chiemsee is divided into the bigger, north section in the northeast called Weitsee and the Inselsee in the southwest.
The region around the Chiemsee is called Chiemgau and is a famous recreation area.