American Samoa, located within the geographical region of Oceania, is one of only two possessions of the United States in the Southern Hemisphere, the other being Jarvis Island. Its total land area is 76.8 square miles (199 km²)—slightly larger than Washington, D.C.—consisting of five rugged, volcanic islands and two coral atolls. The five volcanic islands are: Tutuila, Aunu'u, Ofu, Olosega, Tau. The coral atolls are: Swains, and Rose Atoll.