<P> The Market Theater Gum Wall is a brick wall covered in used chewing gum, in an alleyway in downtown Seattle . It is located in Post Alley under Pike Place Market . Similar to Bubblegum Alley in San Luis Obispo, California, the Market Theater Gum Wall is a local landmark . Parts of the wall can be covered several inches thick, 15 feet high for 50 feet . </P> <P> 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 created small works of art out of gum . </P>

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