"The inescapable federal penitentiary on Alcatraz Island was used to incarcerate some of the most infamous gangsters in modern history. Previously, the island housed a military garrison and jail. Despite its relatively short 30-year period of use, the Alcatraz Federal Penitentiary has become a symbol for the vilest aspects of human nature and the extremes a society will go to, to restrain them."
Alcatraz is located in the San Francisco Bay, in California, United States. Often referred to as The Rock, the small island was developed with facilities for a lighthouse, a military fortification, a military prison, and a federal prison. In 1972, Alcatraz became a national recreation area and received designation as a National Historic Landmark in 1986.
This building increases happiness and provides the player with unattached units of the military buildings constructed in the player's town collectable once every 24 hours (reduced according to the current guild level recruitment bonus).