"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.
It's funny, though, speaking of fathers and sons, because me and John Goodman played father and son, like, five or six years ago in the film 'Death Sentence,' and I got back with him again in 'Inside Llewyn Davis.'
