Chiemsee (German pronunciation: [ˈkiːmzeː] ⓘ) is a freshwater lake in Bavaria,[2] Germany, near Rosenheim.

The Chiemsee is divided into the bigger, north section, in the northeast, called Weitsee, and the Inselsee, in the southwest.

[3] The Chiemsee was formed, like many other pre-alpine lakes, at the end of the last ice age about 10,000 years ago from a hollow carved out by a glacier (a Zungenbecken).

[citation needed] On 1 September 1938 the first Autobahn rest house opened on the A8 on the outskirts of Bernau am Chiemsee on the lake’s southern shore.

From 1945 until 2 September 2003 the building served as an Armed Forces Recreation Center for the US military, called the Lake Hotel.