Protected forest covering the northern third of the island, a UNESCO Biosphere Reserve since 2006 and about 336 sq km in all. There is no single gate, which catches people out. You reach it by driving the Ganh Dau or Bai Thom roads through the forest, or on foot up the Tien Son trail towards Nui Chua, the 603 m high point of the ridge.
The park is inhabited by various animal species, including macaques, otters, deer, and a diverse bird population. Some of the rare and endemic species found here include the Phu Quoc langur, a type of endangered monkey native to the island. The national park covers a significant portion of Phu Quoc Island, encompassing dense tropical forests, hills, valleys, and diverse terrain. The landscape is characterized by lush greenery, waterfalls, streams, and an array of plant and animal species. The park has an entrance area with a visitor center providing information about the park's biodiversity, trails, and guidelines for visitors.