Plenty of our office buildings could use such treatment.
There's a large and boring red brick office building on Capitol Hill that happens to have a fourth floor balcony that runs rectangularly across the front. Its only decoration is a flag hoisted at one corner, that gives a jaunty billow whenever there's a breeze. But when there's a breeze here it's generally accompanied by rain, or a soon to be rain, so the potential observer is most likely jaunting off for cover.
I notice the flag perhaps twice a year, though I pass it most every day.
This is the first time I've ever thought about it, I think. Certainly it's the first time I've ever written about it--or, for that matter, the building, which, to move this right along, would look lovely with boxes along the edge of the balcony, spewing a profusion of something, anything, green.