<p><br> Graphic swirls and whorls brighten an underpass along Arizona Avenue in Atlanta, the work of street artist Hense, commissioned by the city to produce public art. Murals dot several of Atlanta's neighborhoods, many sparked by <a href="http://livingwallsatl.com/">Living Walls</a>, an annual street art conference. Hip and historic mix everywhere in this southern city, growing by leaps and bounds.</p>