I don't know where this contest location is sited, but it is not USA. I do not believe there are any such two roundhouse places left in North America.
Scott nailed it. And so fast, too! I searched Google and other places for these twin roundhouses, but nothing came up. So much for a tough contest! A bit of gee-whiz info about this location: My distant relatives from many generations ago (paternal grandfather's side of the family) came from Katowice. I have wanted to visit for years, but never was able to get it done...