Crown Fountain, Chicago
One of the youngest fountains on our list, the Crown Fountain sits in Chicago's Millennium Park. It is characterized not by large jets of water, but by a pair of LED video screens that stand on the front of 50-foot-tall glass towers.
During the day, the screens show portraits of Chicagoans. The photos rotate frequently, with a single stream of water shooting out from the screen — seemingly flowing from the mouth of the person in the picture. This is a interactive fountain, with children (and adults) often standing near or under the water flow during the summertime.