Legends of Alcatraz Legends of Alcatraz Located in the San Francisco Bay, Alcatraz Island and Alcatraz Federal Penitentiary have been cited as one of the most haunted places in America, and also as the most haunted prison in the country. The Native Americans mentioned the evil spirits they purportedly encountered on the island long before it became a federal prison. Mark Twain documented the eerie atmosphere of the island after visiting it, described it as "being as cold as winter, even in the summer months." Prisoners, rangers and visitors have reported a wide range of alleged ghostly activity on Alcatraz, from whispering in
Alcatraz Federal Penitentiary Alcatraz Federal Penitentiary The Alcatraz Federal Penitentiary or United States Penitentiary, Alcatraz Island (often just referred to as Alcatraz or The Rock) was a maximum high-security federal prison on Alcatraz Island, off the coast of San Francisco, California, which operated from August 11, 1934, until March 21, 1963. The main prison building was built in 1910–1912 during its time as a United States Army military prison; Alcatraz had been the site of a citadel since the 1860s. The United States Disciplinary Barracks, Pacific Branch on Alcatraz had been acquired by the United States Department of Justice on October 12, 1933,