Scuba diving at the Similan Islands in Thailand is something that every serious PADI diver should try to experience. Clear turquoise sub-tropical waters full of colourful and healthy marine life, are surrounded by picturesque islands out in the Andaman Sea. Without a shop or hotel within miles, this archipelago of nine main islands and a few rocky outcrops makes up what surely offers the best scuba diving packages in Thailand and among the best in the world.