Rarotonga is by far, the most visited of the Cook Islands since it is where all international flights arrive, and access to other islands is easiest by seaplane. Although this has not seemed to spoil the landscape, white beaches or crystal clear water of this small island (26 square kilometres), traditional Cook Island practices and way of life is not so easily observed here as on the more remote islands. The main town Avarua, consists only of one street containing a tax-free shop, several souvenir shops, cafes, a car rental shop and a police station. However, as the governmental centre for the Cook Islands, islanders from the outer seas come to Rarotonga for the annual carnival (July) and other competitions and events. The standard of living on Rarotonga is high (very different from Fiji); the islanders live in neat bungalows along the main road, although I would imagine on other Cook Islands, living standards are a lot less.
The island consists of mountainous rainforest in the middle (accessible via the Rarotongan crossing track), encircled by the only main road on the island and stunning white sandy beaches, popular with honeymooners, wealthy families, and backpackers on their way to New Zealand or LA.