"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 think sometimes when children grow up, their parents grow up. Mine grew up with me. We coexist. I don't try to change them anymore, and I don't think they try to change me.