"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.
The art which we may call generally art of the wayside, as opposed to that which is the business of men's lives, is, in the best sense of the word, Grotesque.