The Gum Wall in Seattle Post Alley

Chewing gum is a type of gum made of chicle, a natural latex product, or synthetic rubber known as polyisobutylene. Most chewing gums are considered polymers.

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 wall is by the box office for the Market Theater, and the tradition began around 1993 when patrons of Unexpected Productions' Seattle Theatresports stuck gum to the wall and placed coins in the gum blobs. Theater workers scraped the gum away twice, but eventually gave up after market officials deemed the gum wall a tourist attraction around 1999. Some people create small works of art out of gum.

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.

A scene for the 2009 Jennifer Aniston film Love Happens was shot at the wall in 2008.