Cook Island, South Sandwich Islands

Cook Island is the central and largest island of Southern Thule, part of the South Sandwich Islands in the far south Atlantic Ocean. Southern Thule was discovered by a British expedition under Captain James Cook in 1775. The island was named for Cook by a Russian expedition under Bellingshausen, which explored the South Sandwich Islands in 1819–20.

Map of Cook Island, SIQQ 1ZZ, South Georgia and the South Sandwich Islands

Cook Island measures about 6 by 3 km (3.7 by 1.9 mi) wide. It is heavily glaciated and uninhabited. Its highest peak, Mount Harmer, rises to 1,115 m (3,658 ft).