Lake Lungern

Lake Lungern (German: Lungerersee, also spelled Lungernsee or Lungerensee) is a natural lake in Obwalden, Switzerland which is named after the town Lungern on its shore. The lake is drained by the Sarner Aa river, which flows through the Sarnersee and into Lake Lucerne.[1]

Lake Lungern Lungerersee Lungernsee Lac de Lungern
Map
Location	Obwalden
Coordinates	46°48′9″N 8°9′48″E
Primary inflows	Lauibach, Eibach
Primary outflows	Sarner Aa
Basin countries	Switzerland
Max. length	2 km (1.2 mi)
Max. width	200–800 m (660–2,620 ft)
Surface area	2.01 km2 (0.78 sq mi)
Max. depth	68 m (223 ft)
Surface elevation	688 m (2,257 ft)
Settlements	Lungern

The lake was originally much larger, and covered a large part of the valley it is situated in. Starting in 1836, its level was lowered by 36 metres through an artificial drainage tunnel of 380 m length.[2] It is used as a reservoir.