Don't even think about going to Tijuana, it's way to dangerous and as long
as they haven cleaned up their act, I would not advice anyone going there
which is a shame as I used to love Tijuana and Ensenada.
Others have said pretty much what's desirable to see. I live here
I naturally recommend that part of town, as Robert has already mentioned.
Have lunch at the patio at the La Valencia hotel, and stroll down to the
Cove. Robert probably doesn't remember, but unless you'll be on Prospect
very early in the morning, you won't find parking that easily. The La Valencia
has valet parking and you don't have to worry about finding a spot, at least
for a few hours (meter maids are fierce in that area). Stroll along
Coast Blvd. towards Children's pool and watch the seals, the Museum of
Contemporary Art close by is also quite nice.
Gaslamp Quarter is full of restaurants and nightlife - probably quite interesting for Clive. It's nice to visit though.
I for one think that Sea World is overrated, I much prefer the zoo.