In 2015 a city decided it was time to clean up something that was attracting unwanted visitors. So a maintenance crew began the tedious work of removing more than one million pieces of gum—weighing more than a ton—stuck to the iconic “Gum Wall.” What began twenty years before, when patrons began sticking gum on the wall while waiting in line for the local theater, had turned into a popular tourist attraction. Unfortunately, the wall was also popular with the local rat population!