Lake Sempach is a lake in the canton of Lucerne, Switzerland. Its area is about 14.5 km2 and its maximum depth is 87 m.
A 50-metre-large island named Gamma Insel is located east of Sursee.
In the 17th century the lake counted with five ferries, that brought goods to the weekly market in Sursee.Many inhabitants of local areas swim, boat, paddle, and fish in Lake Sempach, due to its ease of accessibility.
Wikipedia https://en.wikipedia.org/wiki/Lake_Sempach
Address 6205, Switzerland
Coordinates 47°8'38.607" N 8°9'19.056" E