"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 find that you have peace of mind and can enjoy yourself, get more sleep, and rest when you know that it was a one hundred percent effort that you gave - win or lose.