The geography of Georgia describes a state in the Southeastern United States in North America. The Golden Isles of Georgia lie off the coast of the state. The main geographical features include mountains such as the Ridge-and-valley Appalachians in the northwest, the Blue Ridge Mountains in the northeast, the Piedmont plateau in the central portion of the state and Coastal Plain in the south. The highest area in Georgia is Brasstown Bald which is 1,458m (4,784 ft) above sea level, while the lowest is at sea level, at the Atlantic Ocean. Georgia is located at approximately 33? N 83.5? W. The state has a total area of 154,077 km? (57,906 sq mi) and the geographic center is located in Twiggs County .