For such a big place, the UCSB campus only has a couple of caches. Here's another! (1/28/04)
There can be a very high muggle population here, depending on the time of day, so try not to look too suspicious.
Make sure and check out the 4 big fish (carp I believe) in the pond. Two are dark gray in color, 2 are bright orange, and they are very friendly! Splash your hand in the water, and they should come right over! Take a picture of them for extra credit.