abstract background blue changing choppy color colors colour colours cruise-liner cruise-ship currents dark deep deep-blue distance distant ebb-and-flow expanse foam foaming froth Indian-ocean light motion movement ocean powerful reflections ripples rippling salt-water sunlight surf surface texture textures troughs vast vibrancy vibrant view wake wallpaper wash water waves white above aerial aeroplane airplane arial below blue-haze brown bushland conditions country-side dry flying formations from-above geologically-significant height high isolated landscape looking-down moving outback panoramic panoramic-views remote riverbed rough rugged rural scenery scenic shadows sightseeing sparse sunshine terrain travel travelling undulating vegetation views lines riverbeds saltflats angles architectural architecture buildings business-district city city-scapes city-views colored coloured commercial-building contemporary contrast contrasting elements exterior external glass heights high-rise linear metropolis metropolitan-area modern office-buildings perspectives rectangles rectangular skyscrapers tower-block urban-area walls wealth windows Alice-Springs appearance central-Australia lined mountainous valleys