I would tell you if you are only going to see one ...

I would tell you if you are only going to see one museum in Baltimore, make it this one. The exhibits are constantly changing, I've been going for years and there is always something new. Especially if you like Visionary and surreal art. Also the restaurant is worth checking out as well, it's not the typical "catch the tourist while they're hungry with overpriced cafeteria food" affair. It stands on it's own as a great place for good and drink. This place is a "must see" in Baltimore.