brick bridge cantilever clouds coast cross Edinburgh estuary famous Forth grey iron landmark metal paint painting Queensferry rail railway red river rocks scotland sea shore sky span stone tower train water alert appropriate-behavior appropriate-behaviour direction environment expectorate expectorating health health-risk historic-sign no-spitting not-allowed not-permitted old permission-denied pollution prohibited prohibition railway-platform sign spit spitting unhealthy warning road suspension beneath blue cobble cobbles decay depot Dirt dundee garage gray ground line pattern paved pavement perspective public street tarmac texture track tram tramcar transport under Victorian weeds agriculture antique canisters cans cart churn containers dairy farming galvanised galvanized handles lid lids milk milk-cans milk-churns milking platform-trolley railways retro sealed standing station storage transportation trolley vintage