You can see some whacky stuff in Google Maps. Like this:
(:includesite http://maps.google.com/maps?hl=en&ie=UTF8&t=k&ll=32.44445,-109.95821&spn=0.04346,0.06094&z=13&output=embed width=355 height=300 border=0 scroll=no :)
This is an aerial view of a series of circular fields in Wilcox, near Tuscon, Arizona.