Having lived in Paris for two years it's certainly one of my most favorite cities. Much more compact that london, I find it to be a very walkable city. I took this photo of a window box while wandering semi-aimlessly around the Montmartre area of town, near Sacré Coeur. The original image is from 1998, scanned into photoshop and then run through Topaz Simplify to get this effect.
I don't have a wider view of this scene but I can imagine from inside that window, the colorful scene provided by the plants in the window box would brighten up what might otherwise be a view of another wall and window, just across the street or perhaps give the feeling from inside that one is looking out over a garden and not on the 5th or 6th floor of an aging apartment building.