Well there is the Glenn L. Martin Museum
701 Wilson Point Rd
Baltimore, MD 21220
Hangar 5, Suite 531
Phone Number: 410-682-6122
Museum Hours:
11:00 AM to 3:00 PM (except holidays),
Wednesday through Saturday
Also if you contact Col Rohr he can give you a guided tour of several little known and visited locations around the area.
b25j@comcast.net Obviously you have the Smithsonian about an hour south.