The West Indies is a subregion of North America, surrounded by the North Atlantic Ocean and the Caribbean Sea, which comprises 13 independent island countries and 19 dependencies in three archipelagos: the Greater Antilles, the Lesser Antilles, and the Lucayan Archipelago.
The subduction of the South American Plate and part of the North American Plate beneath the Caribbean Plate produces both the Puerto Rico Trench, the deepest part of the Atlantic Ocean, as well as the active volcanoes of the Lesser Antilles (bottom left of the image, south of the Virgin Islands)
The Lesser Antilles are a group of islands in the Caribbean Sea. They are distinguished from the large islands of the Greater Antilles to the west. They form an arc which begins east of Puerto Rico and swings south through the Leeward and Windward Islands almost to South America and then turns west along the Venezuelan coast as far as Aruba. Barbados is isolated about 100 miles east of the Windwards.
Trunk Bay, United States Virgin Islands