One can tell when they are getting closer to Wall, South Dakota just by the frequency of the signs advertising Wall Drug. Over a million people stop at Wall Drug every year -- 20,000 on a good summer day. These adventurers are lured by the tantalizing Wall Drug billboards, thousands of which once beckoned from roadsides coast to coast and from Canada to Mexico. Wall Drug's days of billboard glory ended in 1965, when Lady Bird Johnson bulldozed her nationwide Highway Beautification Act through Congress. After publicly proclaiming that road signs were "junk," she began a one-woman terror campaign of billboard-razing that continues to this day. Wall Drug's lovable signs have been among her most notable victims. The other were the Burma Shave signs.