Gum Wall - Post Alley informal leaving ritual

The Gum Wall in Post Alley beneath Pike Place Market is a long-standing informal practice in which visitors affix chewed gum to the brick wall, creating a multicolored collage that has been covered in news and guidebooks. The accumulation began in the 1990s and became a noted tourist phenomenon; it was cleaned in 2015 and has since been rebuilt by visitors. The site is frequently described as a folk ritual of leaving a small, personal mark while visiting downtown Seattle.