Lake Hévíz Lake Hévíz Lake Hévíz is located in Hévíz, Hungary, near the western end of Lake Balaton, from Keszthely. It is the largest thermal lake in the world, which is available to bath ( in area). The flow of water is very strong and the water in the lake is completely replenished every 72 hours. The fauna and flora are unique in Lake Hévíz due to the temperature and chemical composition of the water, contains carbonic acid, calcium, magnesium, hydrogen carbonate, reduced sulfuric compounds as well as oxygen in solution. Several species so far can be found only in this lake.
Lake Ladoga Lake Ladoga Lake Ladoga ( or ; [earlier in Finnish "Nevajärvi"]; ; ) is a freshwater lake located in the Republic of Karelia and Leningrad Oblast in northwestern Russia, in the vicinity of Saint Petersburg. It is the largest lake entirely in Europe, and the 14th largest freshwater lake by area in the world. "Ladoga Lacus", a methane lake on Saturn's moon Titan, is named after the lake. In one of Nestor's chronicles from the 12th century he mentions a lake called "the Great Nevo", a clear link to the Neva River and, possibly furthermore, to Finnish "nevo" "sea" or