architecture background city classic downstairs elements hand handrail rail saavem stair stairs stone texture upstairs blue cattle cattlegrid crossing gate grid HDR Nyberg path railway sky summer tracks train England fence grass grassland Great Britain Natural landscape oak Quercus railings spring Surrey tree wood bridge coast coastline cross dundee estuary hills iron maintenance metal repairs river sea shore shoreline Tay water arch centre contemporary footpath glass modern over pedestrian span steel stylish walk walkway cumbria english lines platform rural signal sleepers station track view