Been a while since I've been to San Diego, but there are some nice
places there. Sea World, if it's still there and you like that sort of
thing and haven't been in a while, etc.
But the best thing there is Balboa Park. It has one of the best zoos in
the country, unless you hate zoos. But even if you don't go to the zoo,
it is a beautiful park with some restored old homes you can visit and
just generally walk around.
If you haven't made your room reservation yet, avoid the Hotel Del
Coronado. It's very old, beautiful and famous, but they rip people off.
I took my first wife there to get away for a weekend just before our
first child was due, and reserved a room with an "ocean view". I paid
quite a bit extra for it. When we got there, we couldn't see the ocean,
so I called down and complained. The bellhop came up and showed me that
if we moved a very large overstuffed chair out of the way and stood in
a corner with our back against the wall, we could see a tiny sliver of
ocean! I'll never go back!
SD is a beautiful place, though getting to be more and more a suburb of
LA, unfortunately.