Barbuda is an island and dependency located in the eastern Caribbean forming part of the twin-island state of Antigua and Barbuda as an autonomous entity. Barbuda is located approximately 30 miles (48 km) north of Antigua. The only settlements on the island are Codrington and its surrounding localities. Barbuda is a flat island with the western portion being dominated by Codrington Lagoon, and the eastern portion being dominated by the elevated plateau of the Barbuda Highlands, with salty ponds and scrubland spread throughout the island. The climate is classified as tropical marine.