Caldey Island width at its widest. It has an area of and its highest elevation is . The island lies in Carmarthen Bay on the northern side of the Bristol Channel in the county of Pembrokeshire, a little over south of Tenby on the mainland of southwest Wales. It is separated from the mainland by Caldey Sound. A ferry service from Tenby goes to Caldey Island in the spring and summer months when the weather allows. Boats depart every half hour from the harbour at high tide, while at low tide they depart from Castle Beach. Caldey Island consists of two islands
South Island world's 12th-largest island. It is divided along its length by the Southern Alps, the highest peak of which is Aoraki/Mount Cook at 3,724 metres (12,218 ft), making it 9th-highest island, with the high Kaikoura Ranges to the northeast. There are eighteen peaks of more than 3000 metres (9800 ft) in the South Island. The east side of the island is home to the Canterbury Plains while the West Coast is famous for its rough coastlines such as Fiordland, very high proportion of native bush, and Fox and Franz Josef Glaciers. The dramatic landscape of the South Island has made it