Arkansas is located near the geographic center of the United States and is often classified as part of the Midwest, Southwest, and/or Southeast regions. Known as “The Natural State,” the Arkansas landscape features timberland, mountains, plains, and rivers. Agriculture and aquaculture continue to be leading industries in the state, encompassing more than 25 percent of the overall economy. Arkansas is the leading United States producer of rice, second in poultry, and third in catfish. The world’s largest public corporation, Wal-Mart, has its headquarters in Bentonville, Arkansas.