Few places in America have inspired as many stories as Alcatraz. The island prison in San Francisco Bay has become as famous for its legends as for its inmates. Stories of shark-filled waters, daring escapes, brutal isolation, and even ghostly encounters have helped turn "The Rock" into an American icon. But how much of what we think we know about Alcatraz is actually true? Here are some of the most famous myths surrounding the island, and the facts behind them.