I haven’t mentioned this in quite a while but Bank of America has a great Museums on Us  program in which account holders, credit or debit, can get free access to 150 museums on the first weekend of every month this year. It’s not just museums, it includes zoos, science centers, and gardens and you can find the full list on the Museums on Us program  website.
If you’re in Maryland, there are only two participating museums and both are in Baltimore. Included are The American Visionary Art Museum (I’ve been there for a wedding, it has some trippy “modern” stuff) and the Reginald F. Lewis Museum of Maryland African American History & Culture.
Get yourself some of the free culture! (this weekend is one of the free weekends)