The Market Theater Gum Wall is a local landmark in downtown Seattle, in Post Alley under Pike Place Market. Similar to Bubblegum Alley in San Luis Obispo, California, the Market Theater Gum Wall is a brick alleyway wall now covered in used chewing gum. Parts of the wall are covered several inches thick, 15 feet high for 50 feet.
The Seattle Gum Wall is also one of the germiest tourist destinations on Earth. In a ranking made by Trip Advisor, it came in second place, after Ireland’s Blarney Stone. It was named one of the top 5 germiest tourist attractions in 2009, second to the Blarney Stone.It is the location of the start of a ghost tour, and it is a popular site with wedding photographers. There are literally thousands upon thousands of pieces of bubblegum stuck to these walls. Sort of like a giant communal installation art piece!