beach coast coastline color colored colors colour coloured colours distance distant expanse footprints growing growth industrial activity industrial area Jetty layers levels low tide mangroves natural ocean outcrop pebbles people plants pollution prints receding receding tide recreation relaxing rock formations rocks rocky rough sand sandy sea seashore seaside shade shadows shapes ships shore shoreline Sizes stones stony strolling sunlight sunshine tidal tides variety waders wading water waterline beachfront sea view sea wave wave blue clouds summer sunset waves yellow sun break Dorset England footprint Lyme Regis tide winter Cornish cornwall english Great Britain nature