The ancient stone structures are located around the beach ridges. Most of them are on the north and south sides. Overall, twenty-one sites are known. Three of them are larger than the others. They can be found on the northwest side of the island. The sites are either temples, houses or graves. The temple ruins are referred to as marae. Similar marae have also been found on other islands, such as Raivavae, one of the Austral Islands.