Tangkoko-Duasudara Nature Reserve (8890 ha) sits like a thumbnail on the northern east tip of the peninsula. This Reserve is one of the most beautiful rain forests in Indonesia .
The Reserve contains 3 volcanoes:
-Mt Tangkoko (1109 m).
-The ash cone of Batuangus (450 m) which resulted from an eruption in 1893.
-And the twin peaks of Duasudara (1351 m).
The Tangkoko-Duasudara has been famous the time of Wallace, a British naturalist who visited Sulawesi in the 1850 s,for its abundant and unusual wildlife (e.g.,Maleo bird).In 1919 the Dutch colonial government declared Tangkoko a Nature monument. In 1942, the Nature protection ordinance established Tangkoko as a Nature Reserve. After independence the Reserve was retained as a Nature Reserve and responsibility fell under the Ministry of Forestry.