Location: Angola, La.
Year opened: 1835
Inmate population: 5,108
Facts: Louisiana State Penitentiary at Angola is America's largest maximum-security prison. The prison sits on 18,000 acres of farmland-- corn and soybeans are the primary crops. It also has a herd of 1,500 cattle. Angola is the only prison in America that offers a college degree program on prison grounds.