It has long been estimated that there are tens of thousands of un-excavated archaeological sites in Mexico. It will take many decades to get to all of them, which is very comforting to me. It’s good to have mysteries in our lives. Here is an example of a stone jaguar that was just discovered, weighing in at over a ton. http://www.mexicotoday.org/article/new-archaeological-discovery-2000-year-old-jaguar-adds-history-mexico . The next time you are in southern Mexico, get away from the city and the tourist track and go see some of the lesser known sites. You will feel the mystery.