If you go to St. Augustine on the trip. You will see lot of good place to go in St. Augustine. But, I am been there in St. Augustine for 12 years in my old school years ago. I can help you out there that I know the place is. There is good place to go on the tour on the train near St. Johns Public Library on San Marco Ave. There is another one for Old Jail right next Dunkin Dounts. I remember when I was there in St. Augustine.
If you want good restaurant near the mall on Ponce De Leon Blvd on US 1. You would able see more town of St. Augustine is growth than before. Probably you will go around at the beach on A1A.