Savannah is located in southeastern Georgia, on the Savannah River near its mouth on the Atlantic Ocean. It is one of the leading seaports of the southeastern United States and a focus of road and railway transportation. Tourism is important to the economy, as are nearby military facilities. Savannah is famous for its gardens and squares and its extensive downtown historical district. It is the oldest settlement in Georgia. A 2006 real estate survey has estimated the population of Savannah, Georgia at 128,453.