Aitutaki, also traditionally known as Araʻura and Utataki, is the second most-populated island in the Cook Islands, after Rarotonga. It is an "almost atoll", with fifteen islets in a lagoon adjacent to the main island. Total land area is 18.05 km2, and the lagoon has an area of between 50 and 74 km2. A major tourist destination, Aitutaki is the second most visited island of the Cook Islands.
Aitutaki had a population of 1,712 in 2016. The main village is Arutanga on the west side.
Wikipedia https://en.wikipedia.org/wiki/Aitutaki
Coordinates -18°51'33.775" N -159°46'57.958" E