barrier block blockade concrete defence defensive groyne madeira obstruct protect protection sea shield shore stop tide wall water background brick bricks building castle climb closed historic historical monument old pattern stuck texture tile wallpaper walls 3D addiction army backdrop bad relationship barbed barbwire black concept danger design farm fence graphic habit illustration industrial iron isolated jail line metal metallic military oxidised prison rust safety security sharp spike spiral steel symbol vector war wire bar barricade beach beach-sands beams coast dark-ocean disturbed dry dry-sand erected erection fencing footprints light obstacle ocean outdoors outside perspectives public quiet sand sand-tracks sandy seashore seaside stays summer sun sunlight sunshine swimmers swimming tracks uneven view views warm wood wooden wooden-barrier access-denied beach-path blocked closure dune-vegetation emergency-mesh erosion erosion-control fenced greenery netting plants red secured shadows slope sloping