The Cook Islands are in the South Pacific Ocean, north-east of New Zealand, between French Polynesia and Fiji. There are fifteen major islands, spread over 2.2 million square kilometres of ocean, divided into two distinct groups: the Southern Cook Islands, and the Northern Cook Islands of coral atolls. The islands were formed by volcanic activity; the northern group is older and consists of six atolls (sunken volcanoes topped by coral growth). The climate is moderate to tropical. from wikipedia