black brooding cliff coastline Cornish cornwall dark England english granite granitic Great Britain natural nature ocean rocks rocky sea shore stones view water wild beach coastal face grass meadow rock sand surf tide waves blue low tide Molluscs mussels Mytilus seascape shellfish alone countryside crop Devon farm field green hedgerow isolated landscape lane lone one peace rural single spring tree forceful powerful rough slap smack spray violent betray danger islet Pembrokeshire spume summer treacherous united kingdom wales welsh coast coastal and oceanic landforms gravel holiday horizon leisure natural environment shingle sky Sussex vacation cloud common home house people playing pub Surrey trees village walk white breakwater chalk cliffs crashing groyne railing Seaford stack stormy ancient architecture building corner door historical homes houses old road shipboard slope street town uphill weatherboard windows Brecon Beacons footpath hills mountain sunlight track trail