The presence of Moai statues in a work isn't a trope on its own. You may be looking for one of the following:

* AlternateLandmarkHistory: Giving an alternate backstory to a real life landmark.
* FantasyCounterpartCulture: Fictional locations based on ones that exist in real life.
* LandmarkOfLore: Locations with a lot of lore surrounding them.
* LivingStatue: Statues that are alive, including living Moai statues.
* UsefulNotes.RapaNui: The home of the Moai statues, also known as Easter Island.
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