What to do on a sunday in San Diego

GSPeP

Four of us will be arriving next thursday evening in San Diego (if all goes well)

- Friday we have planned to do some sight seeing (USS Midway, harbour tour, etc)
- Saturday we will be all day at the Miramar airshow (in the flight deck chalet)
- Sunday we don't know yet. Any ideas on what to visit? Main interests are planes and trains. Sea World is not an option at this moment.

After that we'll be moving on to Flagstaff, Las Vegas, Los Angeles and back to San Diego.