Here Daily Star unlocks 15 facts about the prison including what happened.The once-barren Alcatraz Island, located 1.25 miles off the coast in San Francisco Bay, was named after resident pelicans by Spanish sailors.
It was a fort and military lock-up before becoming a federal prison in 1934. Heavily guarded and surrounded by water with strong currents and sharks, plus jagged rocks, authorities believed Alcatraz was escape-proof, reserving it for America’s most dangerous criminals.
Over the years it held more than 1,500 male prisoners. Cells measured 9ft x 5ft with a bed, desk, toilet and cold-water sink.
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