My son and I made the trip to Santa Cruz to visit this place (on our way to Monterey, so it wasn’t far out of the way). It was a hoot! Most of the stuff can be easily explained by manipulating the slope of the floor in relation to what the visual cues would suggest. There was one thing, though, that can’t be explained by gravity (the pendulum). I’m still a bit freaked out by that one. :D

After hearing the guide mention the theory about an alien space ship, my son and I decided that the place is all wonky because there’s a Tardis buried somewhere nearby. ;) It was fun, and we both enjoyed it, but I agree with others who’ve said it’s not worth making the focal point of your trip – it’s a quick side trip, nothing more.