"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.
At thirty a man should know himself like the palm of his hand, know the exact number of his defects and qualities. ... And, above all, accept these things.