Some of the most notorious murderers, terrorists, and other criminals are housed in some of the worst prisons in America. Whether it’s Folsom State Prison – made famous by Johnny Cash; Rikers Island in New York or San Quentin State Prison, these are some of the most dangerous correctional facilities in the United States when it comes to inmate violence, prison health concerns, the notoriety of inmates and their crimes, and more. WatchMojo counts down ten of the most notorious American prisons.