beach cliff coastline Cornish cornwall current England english flow Great Britain mouth natural nature ocean reach river sand sea shore surf tide water waves yellow ancient arches architecture arno bridge city covered firenze Florence historical italian Italy landmark old tourism tourist attraction town urban coast cross crossing dundee estuary hills iron maintenance metal rail repairs shoreline Tay tracks clouds forest green planks rails route sky travel view wales welsh wooden alps bavaria blue blue water countryside field germany grass landscape meadow mountains scenery spring sunshine trees