Tangkoko Nature Reserve

Tangkoko Nature Reserve is a protected lowland rainforest reserve on the eastern tip of North Sulawesi near Bitung City. Established to protect Sulawesi's endemic flora and fauna, it covers about 8,700 hectares including coastal forest and hills. It is notable for its high density of endemic wildlife, including spectral tarsiers, Sulawesi crested black macaques, and hornbills, making it a key ecotourism destination in Wallacea.

Visitors can expect guided walks through dense lowland tropical rainforest with tall trees, coastal vegetation and volcanic foothills of Mount Dua Saudara. Exploration is on foot along natural forest trails with a licensed guide. Wildlife sightings include groups of Sulawesi crested black macaques, spectral tarsiers at dusk in their roost trees, hornbills, kingfishers and cuscus. There are no large visitor buildings inside the forest; the experience is focused on nature observation and photography.