From 1971 until its demolition in 1991, Comiskey was the oldest park still in use in Major League Baseball (it had already been the oldest in the American League since 1955). Many of its known characteristics, such as the pinwheels on the "exploding" scoreboard, were installed by Bill Veeck (owner of the White Sox from 1959 to 1961, and again from 1976 to 1981). Another Veeck innovation was the "picnic area", created by replacing portions of the left field walls (the side of the field not facing the setting sun) with screens and setting up picnic tables under the seating areas. This concept was later extended to right field. During Veeck's second ownership, he installed a shower behind the speaker horns in the center field bleachers, for fans to cool off on hot summer days.