Geography of the United States York City, and includes the Florida peninsula. Areas further inland feature rolling hills, mountains, and a diverse collection of temperate and subtropical moist and wet forests. The Appalachian Mountains form a line of low mountains separating the eastern seaboard from the Great Lakes and the Mississippi Basin. The five Great Lakes are located in the north-central portion of the country, four of them forming part of the border with Canada, only Lake Michigan situated entirely within United States. The southeast United States, generally stretching from the Ohio River on south, includes a variety of warm temperate and subtropical moist and
Geography of the United States listed as (land + inland water only). The listed total area changed to in 1997 (Great Lakes area and coastal waters added), to in 2004, to in 2006, and to in 2007 (territorial waters added). Currently, the CIA "World Factbook" gives , the United Nations Statistics Division gives , and the "Encyclopædia Britannica" gives (Great Lakes area included but not coastal waters). These sources consider only the 50 states and the Federal District, and exclude overseas territories. By total area (water as well as land), the United States is either slightly larger or smaller than the People's Republic of China,