Geography
The lake is located in an eponymous basin, formed by a tributary of the Draugletscher that is itself tracing out a tectonic fault. The lake was much larger in the past than it is today, as evidenced by the extensive marshland to the east and north of the lake. The lake has an oblong-oval shape. To the west lies a bay, into which the tributaries flow. To the east is a narrow peninsula, which extends about into the lake. In the middle of the lake there is a shoal where the water is only deep, but nearby the lake reaches its maximum depth of . The peninsula and the shoals are part of rock ridges that sweep under the lake bottom in a southwest-northeast direction. The western shore of the lake has extensive silt deposits, part of a sandy moor covered with sedge and reeds that extends to the Hafnersee. There is also a small pond, the "Moorteich." The catchment area of the lake covers . Of these, around 54% is forested, 30% agricultural land, 6% waters, and the remainder is developed into settlements or recreational areas.Carinthian Lake Research Institute: ''Kärntner Seenbericht 1992. 60 Jahre Seenforschung, 30 Jahre Seensanierung''. (a.k.a. ''Veröffentlichungen des Kärntner Instituts für Seenforschung'' 7) Klagenfurt 1992, pp. 119–134.Usage
With the exception of the northern shore, most parts of the lake and its catchment area are located in the Keutschacher Lake Valley nature reserve. However, the lake itself and the associated fishery are privately managed, and the lake is a popular site for bathing and fishing. On the south bank there are two nudist campsites with capacity for up to 3,000 guests.Stilt dwellings
The shallows of the lake contain a pile dwelling from about 6000 years ago that appears to have been occupied for about 300 years. It is one of the oldest of four pole periods in Central Europe. At that time, the water level of the lake may have been around 1.5 m lower than it is today, so that village would have been located on an island. The settlement includes two types of houses: log cabins with mud walls and half-timbered houses made of wickerwork. The woods used to construct the structures vary widely.References
External links
{{Authority control Lakes of Carinthia (state)