Top 10 Infamous Prisons in the World

9. Alcatraz Penitentiary – San Francisco, USA

Often referred to by its inmates as ‘Hellcatraz’. The Alcatraz prison is one of the most infamous prisons in history. Opened in 1934, its inmates once included gangsters like Al Capone, George ‘Machine Gun’ Kelly and Mickey Cohen. The prison is located at Alcatraz island off the coast of San Francisco. It gained notoriety for the living conditions, mental torture and clashes between inmates. The prison was closed in 1963. It is now preserved as a museum.