The most striking feature of the Ko Similan Islands, at first glance, are the huge boulders that grace the shores and the blinding bright white sand beaches. However, the most interesting sights are beneath the waves with the same boulders below. The boulders have turned the waters around the Similan Islands into an adventure playground for divers. A crystal clear, epic dive at one of the top 10 dive spots in the world! The Ko Similan Islands are also known as Nine Islands because of their number. They are nestle in the Andaman Sea to the north of Phuket. The islands are world-renowned among diving enthusiasts for underwater sightseeing. Accessible only by sea, the Similan Islands are stunningly beautiful with scenes straight out of your dreams of a tropical paradise.