Ahu are stone platforms that evolved from the traditional Polynesian marae, communal or sacred spaces.

Mo'ai or moai are megalithic statues depicting deified ancestors. Many have been placed on ahu, facing inland to watch over the living.

Pukao are hat-like cylindrical structures carved from light-red volcanic scoria and placed on top of some mo'ai. They're believed to represent the long hair of high-ranking men tied in buns on top of their heads.

ŋ or eng as seen in Haŋa Roa, the name of the town, is pronounced as in the English word singing and not as in unglued.