This national park directly west of Barahona covers 800 sq km of mostly mountainous terrain and is notable for the rich variety of vegetation that thrives in its many different climates, from lowland desert to cloud forest. Valleys are home to vast areas of broad-leafed plants, which give way to healthy pine forests at higher elevations. In the mountains the average temperature is 18°C, and annual rainfall is between 1000mm and 2500mm.