"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 an American I wanted to explore... Why are we the only first world country that still has capital punishment? Is it because we're too afraid to really examine the system, or is it because we really truly believe that this is the best way to deter future crime?