The Crown Fountain in Millennium Park has two large screens that display several different faces in rotation. At regular intervals during the Spring, Summer, and early Fall, the faces spit water into the plaza area. On really hot days, you'll see visitors, mostly children, getting cooled off. The mouths are lined up with the water spout to give the illusion of the faces spraying water. The faces are the artist's (Jaume Plensa) modern take on the gargoyles and mythical creatures that usually spray the water in fountains.