Lake Kerkini is in contact with Kroussia and the covered with beech and firs Beles. It was created in 1932 by the barrier built at Lithotopos, when the waters of Strymonas formed a large reservoir of water. In 1982 the dam became higher and the lake larger. The wetland is protected by the Ramsar treaty and is an important research area for wetlands as well as their management. The fish fauna of Lake Kerkini is very important, since over 30 species of fish have been recorded, with many of them being of commercial interest for the residents, such as carp and crucian carp. Over 300 bird species have been recorded in the lake and surrounding mountains. Here resides the Dalmatian pelican and pygmy cormorant, species worldwide endangered. Colonies of cormorants, glossy ibises, spoonbills, herons, lesser white-fronted geese, black terns and greater flamingos live in the lake. However, there are also rare birds of prey in the area. The royal eagle, the peregrine falcon, the spotted eagle and the golden eagle circle above the water and trees. Lake Kerkini is the water area with the biggest amount of yellow and white water-lilies in Greece, giving colour to the blue, the same as do the most buffaloes in Greece walking nonchalantly by its reflections.