https://www.smithsonianmag.com/museu...seum-day-2018/

In the spirit of Smithsonian Museums who offer FREE admission everyday, Smithsonian magazine is hosting a Museum Day Live event where participating museums across the country open their doors to anyone presenting a Museum Day Ticket…for free. This special event will be held on Saturday, September 22nd. Tickets are good for FREE admission for 2 people.