"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.
My parents' marriage was very rocky. They were always arguing. When they split up when I was in my 20s, my brother and I were both delighted because we knew they weren't good for each other.