Sulawesi is one of the four Greater Sunda Islands. The world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Archipelago.
Sulawesi is part of Wallacea, meaning that it has a mix of both Indomalayan and Australasian species that reached the island by crossing deep-water oceanic barriers. The flora includes one native eucalypt, E. deglupta. There are 8 national parks on the island, of which 4 are mostly marine. The parks with the largest terrestrial area are Bogani Nani Wartabone with 2,871 km2 and Lore Lindu National Park with 2,290 km2. Bunaken National Park, which protects a rich coral ecosystem, has been proposed as a UNESCO World Heritage Site.