"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.
You don't realize how hard it is to live on your own. But there's no mom to do your laundry, and make you dinner and to do things for you, and you don't think about little things like buying paper towels and salt.