The Great Lakes from Space by NASA

NASA photo of the five Great Lakes: Lake Superior, Lake Michigan, Lake Huron, Lake Erie and Lake Ontario.  There is still ice on Lake Michigan and Lake Superior but soon it will all be gone and people will be out on the lakes enjoying swimming, fishing, kayaking, surfing, wind surfing, kite boarding and just enjoying the freshwater seas.

From this point of view, we can appreciate the Great Lakes.  They are freshwater seas.