Diving is a very popular pastime in the Cook Islands, given they are the home of the famous black pearls. Many top quality dive operations are available for tourists, although it does pay to remember the closest decompression chamber is in Auckland New Zealand.
The amazing clear waters give an underwater visibility up to 200 feet, with spectacular canyons, caves and wrecks. Fishing is another huge sport and tours range from night fishing with the locals to serious game fishing.
The lagoon, no matter where you are, is perfect for snorkeling, even if you have never done this before. The area is a protected marine reserve, so it means fish are plentiful and easily found in the areas where reef rocks are close by. If you want to spear fish, you may be better heading out to one of the outer islands such as Aitutaki.
Horse or pony riding is a great way to take in Rarotonga's beautiful scenery and it isn't restricted just to the beaches. The trekking by horse back can take care of all levels of expertise, whether you have never been on horseback in your life, or are an experienced rider; they have a horse available to suit every requirement.
Humpback whales visit the Cook Islands (mostly Rarotonga and Atiu) from July to October and come right up to the reef which in places is just 10 metres from shore. The best place to view the whales is on the west coast of Rarotonga at Black Rock and on the north coast of Rarotonga.
Shopping is relaxed in the Cook Islands, with plenty of variety and great bargains to be had. The main shopping area is in Rarotonga, located in downtown Avarua. There are also a number of restaurants, clubs and bars overlooking the beach where you can relax and enjoy the scenery.