Wichelsee is a

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

Obwalden Canton of Obwalden or Obwald ( ; ; ; ) is one of the Canton of Switzerland, 26 cantons forming the Switzerland, Swiss Confederation. It is composed of seven municipalities and the seat of the government and parliament is in Sarnen. It is traditio ...

Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...

. Its surface area is . The

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

is located in the municipalities of Alpnach and

Sarnen Sarnen is a small List of towns in Switzerland, historic town, a Municipalities of Switzerland, municipality, and the capital of the canton of Obwalden situated on the northern shores of Lake Sarnen () in Switzerland. It has a population of just ov ...

. It formed after the Sarner Aa was dammed in 1955. The area around the lake was protected in 2005.Wichelsee - Outdoor Active
Travel Guide Report (In German)

References

Lakes of Obwalden Wichel RWichel Protected areas of Switzerland {{Obwalden-lake-stub