autumnal london cityscape with view to whitehall court rooftops, seen from the southbank

architecture attraction autumn autumnal blue building cityscape cloudy colour colourful court destination embankment england europe exterior facade fall historical history horseguards hotel kingdom landmark landscape london m16 orange outdoors place river roofline roofs rooftops royal scenic season seen sky skyline southbank spring thames tourism towers travel trees united vacation view westminster whitehall