Gum Wall Market Theater in Post Alley, under Pike Place Market. Brick Wall covered with used chewing gums, downtown Seattle, WA, USA Stock Photo - Alamy
Chew on this: Portland Gum Wall may mimic gross Seattle landmark, and some say that idea blows - GeekWire
The Chewing Gum Wall Seattle USA - YouTube
Disgusting pictures show entire wall covered in CHEWING GUM being blasted clean - Mirror Online
Cleaning the gum wall at Seattle's Pike Place Market
Seattle gum wall: steam-cleaners at work to clear 'germiest place on Earth' | US news | The Guardian