There is a park by my house that has three public water fountains more or less right next to each other. One is very old looking, but still works quite well. The second is nearly identical in size and shape, but looks a bit newer. The third is very new and modern looking with a quite different size and shape. They all, however, let spout out a clean, cold stream of fresh water, that provides a welcomed respite on a hot summer day. It turns out, this park and its history of water fountains ...