Louisiana has a humid subtropical climate and is located in the South region of the United States on the delta of the Mississippi River. It has a population of over 4 million people and its landscape includes coastal marshes, delta lands, pine hills and prairies. Some of the main cities in Louisiana include New Orleans, Alexandria, Hammond, New Iberia, Baton Rouge, Lafayette, and Lake Charles. New Orleans is the largest city and has landmarks like the Garden District, Old Ursuline Convent, and Lafayette Cemetery.