The State comprises Antigua, the largest of the Leeward Islands, its sister island of Barbuda (30 miles away) and uninhabited Redonda. These islands are situated between the Caribbean Sea and the Atlantic Ocean, east-southeast of Puerto Rico. There are a total of 153km of coastline. Antigua is mainly coral-based, but is of volcanic origin in the south. Barbuda is a flat coral island. The climate is tropical, with little variation between the seasons. Antigua and Barbuda lies within the hurricane belt.