Of the U.S. states, Minnesota is the 12th largest in area and the 22nd most populous. More than half its residents live in the Minneapolis–Saint Paul metropolitan area, known as the "Twin Cities", which is the main political, economic, and cultural hub. Urban centers in "Greater Minnesota" include Duluth, Mankato, Moorhead, Rochester and St. Cloud. The state's geography is defined by western prairies, now given over to intensive agriculture; deciduous forests in the southeast, now partially cleared, farmed, and settled; and the less populated North Woods, used for mining, forestry, and recreation.