abstract appearance background brown colored coloring colors coloured colouring colours conglomerate contours contrast contrasts cracks fissures flaws grit gritty layered layers levels light lines mica natural rock rock-face rockface rocky rough rugged shade shadows shape shapes silicate stone strata stratum sunlight sunny sunshine surfaces texture textured textures veins wallpaper Asia caves coast coastline color colour distance distant expanse foliage growing growth Hong-Kong-islands Hong-Kong-waters islands ocean outcrop plants rock formations rocks sea seashore shore shoreline Sizes stones stony variety vegetation water waterline beach Hong Kong islands Hong Kong waters national marine park birds currents dunes hot island outdoors outside perspectives public recreation relaxation relaxing sand sandy seaside small summer sun tides tourists view views visitors warm waves wet Australia bush central-Australia clear-sky clumps desert-country desert-region dry grass grass-clumps ground height high hill inland outback peaceful quiet scrub shrubbery shrubs terrain trees