"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 likely to impact yields everywhere, when you put this much stimulus into the markets, it's going to go other places that you hadn't intended, and one of those places is going to be u.s. Debt.