"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.
As I've gotten older, I've gotten more liberal, and my father is increasingly conservative. It's so shocking to me because I always thought we had the same politics. The day I realized we voted for different presidents, I practically fell out of my chair.