Sulawesi, with an area of 180,681 km², is the fourth-largest island in Indonesia, and the eleventh-largest in the world. The landmass of Sulawesi includes four peninsulas: the northern Minahasa Peninsula, the East Peninsula, the South Peninsula, and the Southeast Peninsula. The island is mountainous, and the highest peak is Mount Latimojong at 3,478 meters. Approximately 40% of Sulawesi's land area is in the montane rain forests ecoregion; the surrounding lowlands are in the Sulawesi lowland rain forests ecoregion.