National Park Introduction: The Similan Islands is a protected Thai national marine park and the best diving area in Thailand. The archipelago in this area of ​​water has long been listed as a national marine protection park by the Thai government, and there are management offices on the fourth island and the eighth island respectively, responsible for supervising the activities of each archipelago. In particular, the Thai Navy is responsible for installing buoys at various dive sites and anchoring areas for the purpose of anchoring ships. From now on, they are no longer allowed to anchor arbitrarily to avoid harming corals and other creatures. Such careful protection is evident.