I-90 in South Dakota has gotten much more interesting since I drove across the state (without air conditioning) during the Drought of 1988.
Whimsical, fun and thought provoking, Porter Sculpture Park is one man’s vision of the world around him. Created by welding and working from a great imagination, this park outside of Sioux Falls features over 50 giant metal creatures in the best folk art tradition. South Dakota Tourism
Photos of many more at Flickr
Review from Roadside America
I found this and many other strange places to see in Weird U.S. The ODDyssey Continues by Mark Norman, Mark Sceurman, and Matt Lake.