Kerkini is an artificial lake that was formed in 1932 with the creation of a dam on the river Strymon. In 1982, due to the reduction of the lake capacity due to the sediments from Strymon, a new dam was built. The area of the lake varies from 54,250 to 72,110 acres depending on the season. It is a highly protected wetland and landscape of rare beauty overlooking the mountain Beles and the valley of Serres. Admire the riparian forests, water lilies, and the variety of fish that are a source of income for many residents of the area.