"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.
But if we learn to think of it as anticipation, as learning, as growing, if we think of the time we spend waiting for the big things of life as an opportunity instead of a passing of time, what wonderful horizons open out!