Australia blue-tinged brown bush central-Australia desert-country desert-region dry height high hill hills historic hot inland mountainous mountains outback ridge rocks rocky rough rugged scrub shrubbery sunlight sunshine terrain textures trees beach coast coastline color colored colors colour coloured colours layers levels light low-tide ocean open-area sand sea seashore seaside shade shadows shapes shore shoreline Sizes spray stones stony surf surge surging tidal tides variety water waves wet abstract appearance background contours cracks edges layered lines mottled pattern patterned patterns shape shaped stone surface surfaces surfacing texture textured uneven variations varied various wallpaper beach-side circular concrete construction contained cover covered deep drain drainage draining dunes grasses grille heavy hole lid maintenance metal round sand-dunes sanitation soak-well solid strength strong vegetation well ancient blue cliff exercise footpath Great Britain green historical island menhir natural nature old path Pembrokeshire rock Skomer standing track trail travel Trek united kingdom view wales walk welsh greenery growing growth ocean-edge ocean-waterline plants shrubs tide