Not mentioned in the article is Chattahoochee Plantation, which was, essentially, a fence in the form of a city to keep Atlanta out of Cobb County. <a href="http://news.wabe.org/post/how-atlanta-was-kept-out-cobb-county-10-foot-wide-city" rel="nofollow">http://news.wabe.org/post/how-atlanta-was-kept-out-cobb-coun...</a>