Did anyone ever notice that little hut in the mountains, hills or any other terrain that would never become a city? Maybe, that hut was in a bad place vis a vie your other cities and would totally screwup your territory if it flowered into a new town right were it was. I have and I noticed that planting a new city (via settler) near to it, so that the city's zone has the hut in it, eliminates the possiblity of getting barbarians from that hut and eliminates that ill placed city that the hut would have become. The only problem is the city fathers with sometimes plant that first crop right on top of the hut and destroy whatever was in there.