Accordion Museum
Lynnwood, Washington
Inside the family-run Petosa accordion shop and factory, although "factory" may be even more of a stretch than "museum." Basically it's a collection of over 100 different accordions, some more than a hundred years old, reverently displayed in a building where the Petosa family makes and sells accordions. See the 1907 piano accordion, the rare Uniform Keyboard accordion, the first accordion made by Carl Petosa in 1922.