"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.
I wear clothes that most people in the Midwest would probably deem inappropriate at my age. And I rock a bikini all summer long. I know that it's not normal, but I just don't care. I live once.