Chewing Gum Wall in California By Kaushik Thursday, December 08, 2011 Travel, WTF 2 comments If you are squeamish and easily disgusted, never walk along Bubblegum Alley and don’t touch the walls because lining the walls on this alley is a thick layer of over-chewed sticky bubble gums. This local tourist landmark is located in downtown San Luis Obispo, California. The wall in..