Stock photography picture of A ferryboat in San Francisco Bay, USA, carrying visitors to Alcatraz island, a former prison that has become a museum

AX2HPN - Licenced Caption A ferryboat in San Francisco Bay, USA, carrying visitors to Alcatraz island, a former prison that has become a museum Description A former federal prison in San Francisco harbour Alcatraz has been turned into a museum reachable only by boat Behind this boat is the Oakland Bay Bridge Keywords federal, museum, travel, tourism, tourist, holiday, vacation, bay, water, harbor, harbour, horizontal