Why is Lake Superior an inland sea? Lake Superior has often been called an inland sea due to its large surface area of 31,700 sq mi (82,000 sq km).
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Why is the Black Sea not a lake? Because it's a part of the global ocean. Its waters are saline, it sits at global sea level, and its connection to the Mediterranean Sea via the Bosporus and Dardanelles at Istanbul is one of the busiest shipping straits on Earth.
Do you drink the lake water? Lake Superior is the cleanest of the Great Lakes, and many people drink the water regularly (even in their homes). On trip, the decision is yours. For your safety we bring a high quality water filter or boil our water.
Lawrence Seaway (the Highway H2O): Opened to deep draft navigation in 1959. Distance from the Atlantic Ocean to Duluth, Minnesota via Lake Superior is 2,038 nautical miles and takes 8.5 sailing days.
Geology of Lake InferiorLake Inferior is an underground lake that is located beneath Lake Superior. It is believed to be formed by a process known as karstification, which is the dissolution of limestone and dolomite rock. This process creates sinkholes, caves, and underground rivers and lakes.