If you have the time I recommend a stop at the USS Alabama museum, which is located at the first exit after leaving the tunnel if you are traveling Eastbound.
For a very modest fee you can take self guided (but very well designed) walking tours of the USS Alabama itself. The ship has three color coded tour routes that conduct visitors from the bridge all the way down into one of the magazines. Your entrance fee also gets you into a nice (but small) aviation museum and the USS Drum. The Drum is a highly decorated WWII diesel submarine.
To do the park/museum justice you need to set aside at least two or three hours.
Safe travels.