This national park locates near Andaman sea and consists of 25 small and large islands which can be classified into 4 groups. The first one is Koh Rok archipelago which consists of Koh Rok Nok (Outbound) and Koh Rok Nai (Inbound). Koh Rok Nai’s geography is of steep cliff with long-term eroded crag in the north. The West side is long cliff. In front of the island is 2.4 kilometers long. The highest peak is 208 meters high from the sea level. Koh Rok Nok has its similar size with Koh Rok Nai. The highest peak is 156 meters high from the sea level. Between the mountain passes lays 2 vast plain lands which are Chong Khao Kad Thalu Mountain Pass and Marn Srai Bay. Koh Rok archipelago’s geology is in Permian Carboniferous which is around 345 – 230 millions old. It is rich of natural resource, beach forest, mangrove forest, plentiful coral reefs and beaches around the islands. Moreover, it is abundant of various kinds of animals which can be categorized into 6 main groups. The mammal which can be found in this area is manatee which is wildlife preservation. Another 2 types of mammals which are going to be extinct soon are barking deer and fishing cats. One rare animal is Marshalls’ horseshoe bats and