Iisvesi is a rather large

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 ...

Finland Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, ...

. The lake consists of three separate basins: Iisvesi, Virmasvesi and Rasvanki. Located within

Tervo Tervo is a municipality of Finland. It is located in the province of Eastern Finland and is part of the Northern Savonia region. The municipality has a population of (), making it Northern Savonia's least populous municipality. It covers an area ...

Rautalampi Rautalampi () is a municipalities of Finland, municipality of Finland. It is located in the Northern Savonia regions of Finland, region. The municipality has a population of () and covers an area of of which is water. The population density is ...

Suonenjoki Suonenjoki (; literally means "vein's river") is a town and municipality of Finland. It is located in the Northern Savonia region, southwest of Kuopio. The town has a population of () and covers an area of of which is water. The population d ...

and northern

Kuopio Kuopio ( , ) is a city in Finland and the regional capital of North Savo. It is located in the Finnish Lakeland. The population of Kuopio is approximately , while the Kuopio sub-region, sub-region has a population of approximately . It is the mos ...

in a sparsely populated area, its waters are generally pretty clear.

References

Kymi basin Lakes of Kuopio Lakes of Tervo Lakes of Rautalampi {{EasternFinland-geo-stub