Seattle's Gum Wall is situated at the bottom of the Park Market in Post Alley. The entrance to the market Theater is 240 centimeters high and about 16.5 meters long. In total, about 1 million gum residues are glued to each brick. On average, about 150 gum residues are glued to the wall by many theatre audiences in line in the early 1990s. Sugar was first cleaned up by theatre staff, but then stopped because of frequent overcrowding. In 2009, CNN ranked Seattle "Gum Wall" second only to Blarney Stone, which had accumulated in Ireland for 20 years and was completely cleared in November 2015 in its report "Five Most Bacteriogenic Sightseeing Spots in the World". Except who knows that tourists continue to follow the trend and gradually form a chewing gum wall to become the unique scenery of Seattle.