Cities built around rivers are the norm everywhere, but summer in Florence is so hot and crowded, with some many sights to check off the list, that just as night falls, it is nice to just forget all of that, lean on a bridge rampart and just watch the Arno flow by. It has done so for centuries, so it is not on this hot July evening that the Arno is going to change its ways, and that is why we love it.