1989 4 of 5 on the hillside at the Des Moines Art Center Artwork - Sculpture, Artwork - Land Art/Geoglyphs By: pmoore66
https://maps.google.com/maps?q=United+States&hl=en&ll=41.584724,-93.680949&spn=0.000414,0.000817&t=k&hnear=United+States&z=21