South Korea, officially the Republic of Korea, is a country in East Asia, constituting the southern part of the Korean Peninsula, and sharing a land border with North Korea. 25 million people, around half of the country's population of more than 51 million people, live in the Seoul Capital Area, the fifth-largest metropolitan area in the world.

Lake Superior is the largest of the Great Lakes of North America, the world's largest freshwater lake by surface area, and the third-largest freshwater lake by volume. It is shared by Ontario to the north, Minnesota to the west, and Wisconsin and the Upper Peninsula of Michigan to the south. Superior is the farthest north and west of the Great Lakes chain, and the highest in elevation, draining through the St. Mary's River into Lake Huron.