Phu Quoc island lies in the Gulf of Thailand, about 40 km due west of the Vietnamese mainland. Phu Quoc National Park is situated in the north-east of the island, and the northern and eastern boundaries of the national park follow the coastline. The topography of the national park is hilly, although not particularly steep. The highest point in the national park is Mount Chua at 603 m. The national park is drained by numerous, mainly seasonal, streams. The only sizable river on the island is the Rach Cua Can river, which drains the southern part of the national park, and flows into the sea on the west coast of the island.