Huntington Library Art Collections And Botanical Gardens
1151 Oxford Rd, San Marino, CA 91108
The grounds are gorgeous, and they have a large collection of artwork (especially British). The Blue Boy is here, as well as work by Turner. The Japanes garden is not to be missed, be sure to bring your camera. No food or drink allowed, so don't plan on a picnic. Wear comfortable shoes, there's a lot of walking.
Museum of Tolerance
9786 W Pico Blvd, Los Angeles, CA 90035
You do feel emersed in the experience of this dreadful and historical period, but it can be depressing. It is a great way to learn about the Holocaust for people of all ages and backgrounds, which I enjoy, but I don't think my other half will return, he found it overwhelmingly depressing.