Finland is a country of thousands of lakes and islands—about 188,000 lakes (larger than 500 m2 or 0.12 acres) and 179,000 islands.[39] Its largest lake, Saimaa, is the fourth largest in Europe. The area with most lakes is called Finnish Lakeland. The greatest concentration of islands is found in the southwest in the Archipelago Sea between continental Finland and the main island of Åland.