Danum Valley Conservation Area is a 438 square kilometres tract of relatively undisturbed lowland dipterocarp forest in Sabah, Malaysia. It has an extensive diversity of tropical flora and fauna, including such species as the rare East Sumatran rhinoceros, Bornean orangutans, gibbons, mousedeer, clouded leopards and over 270 bird species. Activities offered are jungle treks, river swimming, bird watching, night jungle tours and excursions to nearby logging sites and timber mills.
The area holds unique status in the sense that before it became a conservation area there were no human settlements within the area, meaning that hunting, logging and other human interference was non existent making the area almost unique. It is managed by Yayasan Sabah for conservation, research, education, and habitat restoration training purposes.
The nearest town, Lahad Datu is about 82 km away (about a 2 hours drive on mainly logging roads). Danum Valley Field Centre is a research establishment for scientists and education purposes, and a nursery for propagating Dipterocarpus trees by the 100,000s. There is one lodge, the Borneo Rainforest Lodge, for tourists. From here visitors can do guided walks through lowland rainforest trails, and many people go there mainly for bird watching. Other activities include night walks and drives. The valley is bowl-shaped, with a maximum land height of 1093m.
The lowland tropical rainforest is home to many birds and mammals. It is the only place where the enigmatic spectacled flowerpecker has been recorded. Bornean orangutans, Müller's Bornean gibbons, and other primates, including Horsfield's tarsier, as well as deer, wild cats and the rare Bornean pygmy elephant may be seen.