Mannar Island (Tamil: மன்னார் தீவு; Sinhalese: මන්නාරම් දූපත) formerly called Manar Island, is part of Mannar District, Sri Lanka. It is linked to the main island of Sri Lanka by a causeway. It has an area of about 50 square kilometres, mainly covered with vegetation and sand. Adam's Bridge (Tamil:ஆதம் பாலம், [1] is a chain of limestone shoals, between Pamban Island, also known as Rameswaram Island, off the southeastern coast of Tamil Nadu, India, and Mannar Island, off the northwestern coast of Sri Lanka.