OC-159 Mangaia Island

Mangaia (traditionally known as A'ua'u Enua, which means terraced) is the most southerly of the Cook Islands and the second largest, after Rarotonga. Geologists estimate the island is at least 18 million years old, making it the oldest in the Pacific. It rises 4750 m (15,600 ft) above the ocean floor and has a land area of 51.8 km. The population of Mangaia comprises about 700 people.