alcatraz cannon, san francisco, california

abandoned alcatraz american ancient antique architecture armory artillery attraction ball battlefield bay building california cannon canon cell cellhouse citadel civil coast coastal correctional creepy criminal defensive destination detention disciplinary dungeon eroding explosive federal fire fixed fortification fortify fortress francisco gulf gun gunpowder historic history incarceration inmate institution iron island jail jailhouse justice landmark military moldy museum national old pelican penitentiary prison prisoner propellant protect protection recreation rehabilitation rock san security soldier states united usa visitor wall war warfare weapon west