"I second the La Jolla Cove, the childrens pool - esp. if you have kids, its a great spot, and you can walk all along the coast, over to the sea lions and up the hills along the coast behind the rich people's houses - also can easily…"
"The must sees are the obvious and not-so:
Balboa Park- allow 1 1/2 days
San Diego Waterfront-around convention center and linear park
Gaslamp District and PetCo Field
Wild Animal Park (Escondido)