Tennessee State Prison. Opened 1898. Employed the Aubrey System: that solitary confinement, hard labour, and a diminished sense of self could inspire personal discipline and respect. 800 unheated, unventilated singly occupancy cells. Closed 1992
10 Worst Prisons in the World—5 Are American: San Quentin State Prison, Marin, CA. San Quentin State Prison in Marin County, California, is a hotbed of prison gang activity and California's only death row for men. The Black Guerrilla Family was founded there in 1966 and the Aryan Brotherhood in 1967. Gangs are subdivided by race and region. Not being affiliated with a gang is dangerous, according to an MSNBC look inside the prison.