Eww is right! Nestled in Pike Place Market’s Post Alley, the Gum Wall is a bizarre tradition which began almost 20 years ago with visitors sticking their chewed gum on a brick wall in the alley. Voted the 2nd Germiest Attraction in the world by TripAdvisor (right behind the Blarney Stone in Ireland!), the Gum Wall is now a masterpiece if wads, clumps and bubbles! When you visit, be sure to make your own addition!