blue coastline Great Britain hard natural nature Pembrokeshire rocks rocky rough sea shore wales water welsh wild autumn beach cliff coast cove Gower rock shoreline architecture building bungalow chalet coastal hill home house row suburb animal arthropod background Balanus barnacles texture bright neighbours painted pink red rose terraced windows arches dam Elan Valley hold landmark landscape old reservoir retain stone tower wall back homes houses lane pavement road sidewalk street town village cloud gray green grey rural storm stormy trees view woodland boat crack fissure horizon stack united kingdom