"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've been given an amazing opportunity and I could not be more grateful. But I also know that all this will eventually die off. It's not real. It will go away and then you'll go away and then, I don't know, I'll be left sitting in some English hotel room.