"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.
What I had said in the morning was that this is what we know has happened, but there has been no significant off-site release. Only to find out moments later that, in fact, there had been an off-site release. I still haven't gotten over that.
