Thailand is part of the Indochinese and Malay peninsulas, stretching almost twelve hundred miles from south to north, all the way from six degrees north of the equator to twenty degrees north. The country is relatively flat except in the north, where mountains and large hills stretch down from Myanmar (Burma) and southwestern China. Rivers flowing down through these mountains eventually empty into the Gulf of Thailand and the South China Sea, along the way providing water for the fertile ricelands of central Thailand.