"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.
Confusingly, the Mediterranean Sea is a type of mediterranean sea and within it are marginal seas such as: the Adriatic Sea, Aegean Sea, Alboran Sea, Balearic Sea, Ionian Sea, Ligurian Sea, and the Tyrrhenian Sea.
Three things have been difficult to tame: the oceans, fools and women. We may soon be able to tame the oceans fools and women will take a little longer.