The Alcatraz Federal Penitentiary or United States Penitentiary, Alcatraz Island was a maximum security federal prison on Alcatraz Island, 1.25 miles off the coast of San Francisco, California, United States, the site of a fort since the 1850s; the main prison building was built in 1910–1912 as a United States Army military prison. The United… Continue reading Alcatraz Federal Penitentiary, San Francisco (California)