This low-lying wilderness of virgin rainforest is recognised as one of the planet’s hubs of biodiversity - its vast canopies shelter some 300 bird species, over 100 mammals - including the clouded leopard, Malayan sun bear, Bornean orangutan and the rare Bornean pygmy elephant - and a profusion of vividly coloured butterflies. This exceptional ecosystem is a popular research destination among natural scientists and it is possible to attend talks by resident environmental experts at the Danum Valley Field Centre. A network of trails wind through the surrounding jungle, taking in viewing platforms tucked amidst the treetops, a suspension bridge over the Segama River, cascading waterfalls and even several ancient burial sites.