San Francisco Bay is the artificial and flat Treasure Island, site of the 1939 Golden Gate International Exposition. From the Second World War until the 1990s, both islands served as military bases and are now being redeveloped. Isolated in the center of the Bay is Alcatraz, the site of the famous federal penitentiary. The federal prison on Alcatraz Island no longer functions, but the complex is a popular tourist site. Despite its name, Mare Island in the northern part of the bay is a peninsula rather than an island. San Francisco Bay is thought to represent a down-warping of the Earth's crust between
Legends of Alcatraz cells and locked cell doors shutting, to phantom figures in corridors, cold spots and even the sounds of musical instruments and sewing machines. Officials for Alcatraz have dismissed the reports of ghosts at Alcatraz as nonsense and deny their existence. Jerry Lewis Champion stated that it is "easy to see that Alcatraz Island contains all the legend and aura for the tales of ghosts and lost souls." The "Los Angeles Times" describes Alcatraz as the "most notorious federal penitentiary this country has ever known. Its history runs far and deep, as do the stories, the rumors, and the legends", and