The Congo is the only river that flows both north and south of the equator. It crosses the equator twice.
Hydrologically speaking, Lake Michigan and Lake Huron are a single lake.
The deepest lake in the United States is Oregon’s Crater Lake.
At 4,145 miles, the Nile River is the longest in the world.
The name Okefenokee Swamp means “trembling earth” in Seminole.
The Dead Sea is nine times saltier than the ocean.
Madrid is the only European capital city not situated on a river.