(Worlds Largest Cornstalk) in the fairgrounds in Washington, Washington County, IA. IA1 S. 0.2 miles from jct with IA92 (Madison St.), E. into fairgrounds 0.1 miles to the cornstalk on the N. side of the road. (N41 17.620 W91 42.619) Photo by Jack & June Schmidt 6-13-12.