AM changed my SAN-SJD-MEX flight (DL award ticket) without my permission (from the 1 hour layover to the 5 hour layover)....I called and they said sorry, but earlier flight sold out. Whatever, I get it.

SO, now I might have 5 hours in SJD if I can't standby for the earlier flight. So, what can I do in 3.5 hours in SJD....any nearby beaches? Lunch spots? Something close?

thanks