bare estuary exposed forest green hills landscape low Mawddach mudflats natural nature peaceful river seashells tide tranquil view wales water welsh across blue coastal distant harbour houses sea shore shoreline Tay town village bridge camera cctv cross crossing Forth pillar road span support surveillance suspension transport sandbars animal farm field Gower hillside mammal meadow pasture rural sheep city Craigowl dundee fields oil rape scenery seed yellow fence gulls Jetty metal ocean pier rest roost roosting seagull seagulls