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Kao Island is an uninhabited volcanic cone in Tonga, rising to 3,389 feet (1,033 meters) and forming the highest point in the island nation. It is part of the Ha'apai Group, a central island cluster in Tonga located in the South Pacific Ocean. The Ha'apai Group consists of approximately sixty coral and volcanic islands spread across about 5,000 square miles of ocean. Kao Island's volcanic nature is a significant geographical feature within this archipelago.1

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