Museum Day is an annual event hosted by Smithsonian Media in which participating museums across the country open their doors for free to anyone presenting a Museum Day Ticket. This year is free admission to one person, plus a guest on September 25, 2010. One free pass per household. There were five pages of museums to choose from in the state of CA when I looked, but this is a national program, so there should be events near you in any state! Check here for site finder. Register early to receive your ticket by email, as they may sell out.
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