Sadly, I have not been to California in years, and probably won't be able to make it there any time soon. But if I were to go, one of the first places I'd hit up is Kat Von D's Wonderland Gallery located in West Hollywood. I checked out her website, and she has some pretty bitchin' artwork on display.
Here are some of the fiercely talented artists that are currently on exhibition:
Kat Von D's Wonderland Gallery 1257 N. La Brea Avenue W. Hollywood, CA 90038