The United States of America is the world's fourth largest country. There are fifty states in the country. Forty-eight are in the same part of North America. The other two are Alaska in the north, and Hawaii situated on eight islands in the Pacific.The United States stretches from the Pacific Ocean to the Atlantic Ocean. Long mountain chains run down the Pacific coast. In this part of the country you can find Death Valley, the lowest place in North and South Americas. There are tall peaks of the Rocky Mountains that run from Canada to Mexico. Beyond them stretch the Great Plains where the mighty Mississippi River flows. Another mountain chain, the Appalachians, runs down the eastern part of the United States. The USA borders with Canada in the north and Mexico in the South.