These "ducks" are everywhere in Seattle - amphibious buses like the Hippo Buses in Toronto and, soon, vancouver which cart tourists around hither and yon for ordinary, directed tours they can do sitting down. In the area around downtown it seems like you can't get away from them, and even when I made my way up to Fremont this one still showed up, passing under the Aurora Bridge. The guide is probably pointing out the Fremont Troll while heading toward something the last thousand groups of tourists saw as well.
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