Unsuccessful in finding it on prior trips, Times reader "PaulKonkirati" snapped this photo after finally stumbling upon Seattle's Market Theater Gum Wall. The travel website TripAdvisor.com named it one of the world's five "germiest" tourist attractions.
The Gum Wall, in Pike Place Market, originated in the 1990s when Market Theater patrons began sticking their chewed gum on the venue's wall as they waited for shows to start. Theater owners tried to remove the gum, but they eventually gave up as the wall began to be known as a tourist attraction. The wall of vintage gum rises 15 feet high and stretches across about 50 feet. Here's a CNN video report that includes the wall.