The ruins in the background are open to the public Mr. Forns; the one in the foreground was an actual excavation that was being funded by several national educational grants and the National Museum of Anthropological Studies in Mexico City D.F. The reins are believed to have been built 270 B.C. and have Byzantine characteristics of architectural design and the type of bricks that were used in the Roman Empire...how they got to Mexico; is still a mystery to this day...a very interesting history in and of itself...I was very fortunate to have access to the dig; compliments of my father in law, who's brother is the administrator of the Anthropological Museum...:D:cool: