The Hintersee (formerly Ferchensee or Forchensee) is a 16.4 hectare lake in the municipality of Ramsau in the Berchtesgadener Land, about two kilometers west of the center of Ramsau. Named after him is the village Hintersee directly on its western shore with about 100 inhabitants.

The Hintersee at the foot of the Reiteralpe and the Hochkalter (2,607 m) formed around 3,500 to 4,000 years ago, when a rock fall from the Blaueistal from the Hochkalter mountain, covering an area of 75 hectares, dammed the Klausbach stream rising on the Hirschbichl and at the same time created the Magic Forest.

Map: Hintersee (Ramsauer Ache)
Map: Hintersee (Ramsauer Ache)