RarotongaLocated in the south of the archipelago, the island of Rarotonga is the largest of the Cook Islands It is home to the capital, Avarua. Natural Selection Cra / age fotostock
The archipelago is divided into two parts, separated by 620 miles of ocean. The nine islands in the south are all volcanic and usually surrounded by a lagoon whereas the six islands in the north are all atolls. The low coral reefs, swept over by waves, are invisible from far away.