Well, there's the beach...lots of beaches to choose from depending on what your tastes are. Easy to Google up information.

And...there's Tijuana....

Lived in Ramona and El Cajon back in the 70s but last visit seemed most of San Diego county was now red tile roofs. Web is probably the best bet to find things you'll wanna see. If you like things military there's plenty to see too.

Ron