"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.
It seems to me that we're in danger of losing sight of certain basic civic values in society by allowing the growth of a whole generation of people who really have no sense of attachment to society.