The Caspian Sea is the biggest saltwater lake in the world.
It borders Iran, Kazakhstan, and Russia.
It runs 750 miles from north to south and about 200 miles from east to west, with a total area of about 143,250 square miles.
The largest freshwater lake in the world is Lake Superior, the deepest of the Great Lakes.
Its borders are Canada and the United States. It’s about 350 miles long and covers approximately 31,700 square miles.