"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.
I wouldn't go up on a stage now if you paid a thousand dollars for one minute of acting. It's a nasty experience. You're up there all by yourself. You're so damn exposed.