Art, History, Science ... You name it and there is probably a museum for it in San Diego and it is probably in Balboa Park!
Yes, its a beautiful green, foresty park and within it are all these different museums. The area reflects the remnants of the World's Fair held here at the beginning of the century.
Instead of tearing down the ornate, deco buildings, after the Fair ended, the City just kept them in place. Now, and this is the only way I can explain it, the area looks like a huge cemetary with rolling green hills and patches of large, old trees with a small thin road meandering through it. And, along the road, every now and then, there appears a large, square art deco type building (yes, one could say a huge masoleum), each with a nice parking area around the front.
Each building is a different type of museum, Natural History, this, that, etc. There are several and each seems to be more popular than the last, given the cars out front. A drive through the Park is lots of fun even if you don't stop in at any of the museums. (How could you choose?)
When we were there on a Saturday, early evening, several of the museums seemed to be hosting parties. There were many there in tuxs and evening gowns, eagerly getting out of their cars, moving quickly, smiling, headed up stone stairs, between columns, to a building's entrance. And in such a rural, natural setting.
What a glorious way to spend a warm summer's evening.