Langkawi, officially known as Langkawi, the Jewel of Kedah, is a duty-free island and an archipelago of 99 islands located some 30 km off the coast of northwestern Malaysia and a few kilometres south of Ko Tarutao, adjacent to the Thai border. Politically, it is an administrative district of Kedah, with Kuah as its largest town. Pantai Cenang is the island's most popular beach and tourist area.