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
Alcatraz Island in popular culture a makeshift task force to track down the inmates and prevent them from committing further crimes while also determining the reasons for their return. Alcatraz's isolated and fortified image has meant that it has been used as a location for fictional hostage scenarios in various instances. A number of books were written or co-authored by former Alcatraz prisoners, e.g.: "Island in the Sun", the band's debut single from 1983, makes multiple lyrical references to Alcatraz Island. Alcatraz Island in popular culture Alcatraz Island has appeared many times in popular culture. Its appeal as a picturesque film setting derives from its