Since 2001 the Richardson Farm in Northern (near Antioch) Illinois has been doing corn mazes in their field. The notable ones are the celebration of the 100th anniversary of flight in 2003, the sox world series and the 20th anniversary of Superbowl XX (you know, the one the Bears won).
Recently they started a remote field, and this year's remote is Chief Illiniwek (pictured at the right). I may have to take a flight over it before it goes away....