Carlisle Bay is a small natural harbour located in the southwest region of Barbados. The island nation's capital, Bridgetown, is situated on this bay which has been turned into a marine park. Carlisle Bay's marine park is a popular spot on the island for scuba diving. Many relics, such as anchors and cannonballs, from ships can be found on the ocean floor in Carlisle Bay. The bay takes its name from Barbados' second Lord Proprietor, James Hay, 1st Earl of Carlisle.