This is the only way to get to “The Rock,” the famous former federal penitentiary that housed some of the nation’s most notorious criminals from 1934-1963. Now one of San Francisco’s most popular visitor attractions, ferries depart regularly for the island from Pier 33 starting at 8:45 am. The dynamic 45-minute cellhouse audio tour, offered in 11 languages, features the voices of former Alcatraz prison guards and inmates who recount escape attempts, prison riots and solitary confinement. The night tours include a narrated boat ride around the island. Tours sell out quickly, so be sure to make reservations in advance. Pier 33, 415.981.7625.