Military families nationwide can enjoy free admission to 600 museums nationwide through the Blue Star Museum project. Go here to check it out and see what museums are participating. The offer allows active duty military and their families to get into museums for free all summer long.
The actual participation dates are Memorial Day to Labor Day. You can search the Blue Star Family database for sites to hit during your summer road trips.
Here are the Alabama sites participating:
Alabama Veterans Museum and Archives
Jule Collins Smith Musuem of Fine Art at Auburn University
Birmingham Civil Rights Institute
McWane Science Center
Demopolis Gaineswood National Historic Landmark
Dothan Landmarks, Foundation, Inc./DBA Landmark Park
Eufaula Fendall Hall
Fairhope Eastern Shore Art Center
Foley City of Foley Museum Archives & Model Train Exhibit
Fort Rucker US Army Aviation Museum
Greensboro Magnolia Grove
Marbury Confederate Memorial Park
History Museum of Mobile
Alabama State Capitol (free for everybody)
Freedom Rides Museum
Montgomery Museum of Fine Arts
Old Cahawba Archaeological Park
Fort Mims Restoration Association
Paul W. Bryant Museum Tuscaloosa Museum of Art: Home of the Westervelt Collection
Wetumpka Fort Toulouse - Fort Jackson Park