Much like a feudal castle,
Hearst Castle sits atop one of the hills overlooking the beach. (Yes, W.R. Hearst apparently acted like a feudal lord as well!) The castle and grounds are lovely, but you don't get to see much on the basic tour, and our guide had to be about the most obnoxious person I'd ever
not had the pleasure to listen to (there were many complaints from other tourists as well). We'd preferred to have seen more of the castle, with less of the guide. I've heard the night tours are nice, and you get to see more of the castle during these; however, you need to plan well in advance to do one.
That said, Hearst Castle is lovely and impressive, both the different buildings and the grounds. The swimming pools are gorgeous and so very, very tempting.
If you have an interest in California Arts & Crafts/ Spanish furnishings and home architecture you're in for a treat as well. The small, tiled bathrooms in the guest rooms/houses were interesting in that they were that small, for such a grand showcase of a house.
Time spent in the museum before your tour is time well-spent as well.
Keep an eye out for zebras -- literally -- as you drive along Hwy 1.