For years, visitors covered Seattle’s Gum Wall with chewed gum; in 2015 workers spent 130 hours removing 2,350 pounds to stop the sugar from eroding its bricks
By 2015, estimates suggested that around one million pieces of chewing gum had found their way onto the wall. Some landmarks are built with steel, stone or glass. Seattle has one made largely of something far less permanent: chewing gum. Tucked beneath…