Review of Escape to Witch Mountain

I've just watched this movie for the first time, and enjoyed it. Sure, a bit wooden and pared down, but the story is basically sound and the feel of the film is both inviting and mysterious. Good grown-up actors - the great Donald Pleasance in particular, of course - and the two kids in the leading parts are likable and convincing. A short question, though: Could any Californian help me with some specifics regarding the film's locations? Especially the rocky coastal landscape seen in the middle part of the film. Exactly where were those scenes shot? Is that area all uninhabited? National/State park? Any small towns overlooking the ocean? Just curious :-)