Ah, Dunwoody... It officially became a city on Dec. 1, 2008. Before then, although not a chartered city, metro Atlantans knew Dunwoody as a quaint DeKalb town with a personality all its own. On Aug. 11, 1971, shoppers poured into Atlanta's newest and largest enclosed mall shopping center as the doors opened to Perimeter Mall, located just off I-285 on Ashford-Dunwoody Road.