Lake, southern Finland.
It is 75 mi (121 km) long and 14 mi (23 km) wide. The lake contains thousands of islands. The lake system is drained southward to the Gulf of Finland by the Kymi River. The irregular shoreline is heavily forested and supports important timber operations that use the lake for transport. There are numerous villages along the lakeshore and many private villas at the southern end of the lake.