I don't remember WHEN I saw it, but it was quite a while ago and like, sdls, I had to look from a long way off and it seemed more conceptual than visually identifiable (I probably didn't have binoculars during that visit), but the concept was FANTASTIC and INTRIGUING. Now that I've seen the pictures you've provided, I'm ready fill my car with the near $3/gallon gas and head for South Dakota!

slds...were you visiting the SAME day that I was?