Lake Lungern

Lake Lungern
Lungerersee Lungernsee Lac de Lungern
Lake Lungern Show map of Canton of Obwalden Lake Lungern Show map of Canton of Bern Lake Lungern Show map of Switzerland Lake Lungern Show map of Alps
Map
Location	Obwalden
Coordinates	46°48′9″N 8°9′48″E / 46.80250°N 8.16333°E / 46.80250; 8.16333
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; 201 ha; 500 acres)
Max. depth	68 m (223 ft)
Surface elevation	688 m (2,257 ft)
Settlements	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]

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 (118 ft) through an artificial drainage tunnel with a length of 380 metres (1,250 ft).^[2] It is used as a reservoir.^{[citation needed]}