the seawall south of blackpool constructed of concrete honeycomb type structures with steps leading to the beach covered seaweed

architecture background bank barrier beach blackpool cement coast coastal coastline cobb concrete constructed covered defence defense defenses energy engineering erosion flood fylde harbor honeycomb landscape leading level made man ocean outdoors prevent promenade protect protection revetment rising sea seabee seawall seaweed shore south stairs steps stormy structures summer system tidal type vacation wall water waves white