New Zealand is located near the centre of the water hemisphere and is made up of two main islands and a number of smaller islands. The two main islands are separated by the Cook Strait, 22 kilometres wide at its narrowest point. Besides the North and South Islands, the five largest inhabited islands are Stewart Island, the Chatham Islands, Great Barrier Island d'Urville Island and Waiheke Island The country's islands lie between latitudes 29° and 53°S, and longitudes 165° and 176°E.