"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
It was in San Diego and I was onstage and couldn't remember how to play the guitar properly. I was in terrible pain and my nervous system was just going wild, like somebody had just run a car over me.