brook desert Grasslands oasis plains river spill splash stream thirsty water waterfall wilderness Alice Springs Australia blue brown bush central Australia clear-sky desert-country desert-region dry foliage gully height high hill hot inland outback rocks rocky rough rugged scrub shrubbery shrubs sky sunlight sunshine terrain textures trees vegetation landscape landscapes mountain mountains nature peace red sun sunset sunsets yellow atv car cars Dirt dune dunes Expedition jeeps sand sandy summer warm .mountain drought hills stones waves