"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 moved to New York last year and I love it. It's a huge change and I've always wanted to spend time there. It's like a more intense London, and everything's up a few notches. The lights are brighter, the pace is faster and the food's better.