angles appearance building bush chimney color colors colour colours contrast contrasting corrosion corrugated corrugated-iron corrugations decay deterioration elements exterior external grime height high iron light metal metal-work neglect old perspectives rural rural-decay rust rusting rusty shade shadows side-wall-chimney surfaces textures uneven variations wall wear weathering ancient history brick cloud derelict farm. farmhouse fell fells fence grass highland hill hills lancashire landscape Natural landscape Pennines plant sky stone stone wall Trough of Bowland window yorkshire