I like culture but not the type that grows in a petri dish. This Seattle tourist attraction is one I'd avoid like the plague.
One of the most offbeat attractions in the United States, the Seattle Gum Wall is also one of the most germ infected tourist spot in the world.
Located in Post Alley, under Park Place Market, the Gum Wall has its beginning in the early 1990s, when people, irritated that they had to wait in line to get tickets to the theater, stuck chewing gum on the wall. At first, they would use the gum to stick small coins to the wall, but in time, the tradition of the coins disappeared, and the gum remained.
Link - Via Book Of Joe