Here are three sources of good images from California:
* The San Francisco Chronicle has a nice video and many photos about how to spend a perfect day in San Francisco.
* The Online Archive of California has over 120,000 historical images of the state.
* Sacramento History Online is a similar, and smaller, archive of photos from the city where I teach.
You might also be interested in The Best Websites To Learn About California.
I’ve placed the link on my website under California.