chest locks long john silver pirate pirate chest pirate treasure pirates robinson crusoe sea chest strong box treasure treasure chest treasure island barred bars caution communicate communication control danger do not do not enter forbidden impede locked notice pipes posted prevent prevented Restrict restricted restriction sign warning anchor captive chain connect corrode corroded fetter heavy iron link lock marine nautical old oxidize prison prisoner red rust rusted rusty shipwreck slave slavery sunken weight wreck aged ancient antique architecture decor dirty door doors doorway entering entrance exit gate grunge handle historical key middle obsolete ornament vintage wood wooden accessible background double-headed emergencies emergency fire-brigade fire-control fire-hydrant firemen fires foliage hydrant Padlocks painted-red prepared pressure safety secure secured security water water-pressure appearance confined display displayed engines equipment fence fenced-in heavy-duty history locomotives machinery machines marshalling-yard mobility power rails railway railway-yard restoration restoration-yard restored steam-engines steam-locomotives steam-trains strength trains transportation against the wall angles blue brightly colored brightly coloured handles lockers numbered numbers personal perspectives privacy pupils rings school school lockers silver space steel storage students wall barrier black closed confine contained contrast dark darkened decorated decorative grille historic light sealed shade shadow solid strong sunlight wrought-iron attached chained connected gates grass heavy-chain linked links metal outdoor outside padlock padlocked property protected rusting securing shut