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 Island 1906 San Francisco earthquake, civilian prisoners were transferred to Alcatraz for safe confinement. On March 21, 1907, Alcatraz was officially designated as the Western U.S. Military Prison, later Pacific Branch, U.S. Disciplinary Barracks, 1915. In 1909 construction began on the huge concrete main cell block, designed by Major Reuben Turner, which remains the island's dominant feature. It was completed in 1912. To accommodate the new cell block, the Citadel, a three-story barracks, was demolished down to the first floor, which was actually below ground level. The building had been constructed in an excavated pit (creating a dry "moat") to enhance