Lake Superior the Soo Locks. Lake Superior is the largest freshwater lake in the world in area (if Lakes Michigan and Huron are taken separately; "see Lake Michigan–Huron"), and the third largest in volume, behind Lake Baikal in Siberia and Lake Tanganyika in East Africa. The Caspian Sea, while larger than Lake Superior in both surface area and volume, is brackish; though presently isolated, prehistorically the Caspian has been repeatedly connected to and isolated from the Mediterranean via the Black Sea. Lake Superior has a surface area of , which is approximately the size of South Carolina or Austria. It has a
Lake Manpo and Lake Bonpo Important Bird Area Lake Manpo and Lake Bonpo Important Bird Area The Lake Manpo and Lake Bonpo Important Bird Area lies within the Rason Special Economic Zone on the coast of north-eastern North Korea, close to its borders with both China and Russia. The 5880 ha site comprises the freshwater lakes, which lie about 3 km apart, and encompasses the 3200 ha Lake Manpo and Lake Bonpo Protected Area. It has been identified by BirdLife International as an Important Bird Area (IBA) because it supports populations of various water- and wetland birds including swan geese, greater white-fronted geese, whooper swans, Oriental storks, white-naped