The state of Michigan is the only one in the country with two peninsulas. The Lower Peninsula is shaped like a mitten. The Upper and Lower Peninsulas are separated by the Straits of Mackinac, a five-mile (8-kilometer) waterway connecting Lake Huron and Lake Michigan. The Mackinac Bridge binds the peninsulas. Four of the five Great Lakes and Lake St. Clair surround Michigan, which has the world's longest freshwater coastline of any political entity. There are 64,980 inland lakes and ponds. After Alaska, Michigan has the second-highest quantity of water in the nation.