The West Indies is a region of the North Atlantic Ocean and the Caribbean that includes the island countries and surrounding waters of three major archipelagos: the Greater Antilles, the Lesser Antilles, and the Lucayan Archipelago.
The region includes all the islands in or bordering the Caribbean Sea, plus The Bahamas and the Turks and Caicos Islands, which are in the Atlantic Ocean. Depending on the context, some references to the West Indies may include some nations of northern South America that share the history and culture of the West Indian islands.
The West Indies is a geologically complex island system consisting of 7,000 islands and islets stretching over 3,000 km from the Florida peninsula of North America south-southeast to the northern coast of Venezuela.
These islands include active volcanoes, low-lying atolls, raised limestone islands, and large fragments of continental crust containing tall mountains and insular rivers. Each of the three archipelagos of the West Indies has a unique origin and geologic composition.