This river cruise takes you through Borneo's most famous orangutan sanctuary: the Tanjung Puting National Park. In addition to orangutans, you will experience Indonesia's largest and most diverse coastal heath and peat swamp forest; and some of the other wildlife it is a home to, such as Rhinoceros Hornbills, Proboscis Monkeys and Bearded Pigs.

A river boat is the ideal great way to experience this kind of environment, providing an ever-changing scene of tall rainforest trees, riverside nipa palms, mangroves and resident birdlife. Whilst your viewing deck provides a wonderful platform to observe it all in comfort, your boat also acts as a mobile base from which expert local guides will take you on exciting treks into the forest.

In the company of local forest rangers, one of your stops will be Camp Leakey: Asia's most famous research and conservation centre for orangutans. This was established in 1971, when one of Dr Louis Leakey's trio of Great Ape researchers first established this base to begin 5 decades of intensive research into orangutans. Her name, Dr Birute Galdikas, sits alongside Jane Goodall, who immersed herself amongst chimpanzees in Tanzania; and Diane Fossey who spent years with Gorillas in the Mist of the Virunga Mountain volcanoes of Rwanda.

Pongo pygmaeus orangutans are present in Borneo, and although the most populous species of orangutan, only an estimated 104,700 are left in the wild. Their main threats include forest fragmentation through road building and illegal hunting for bushmeat and illegal pet trade. A large proportion of the orangutans you will see on this journey will have spent time at one of three rehabilitation centres you will visit. These centres provide great opportunities to see these Great Apes close-up and learn about their behaviour, conservation pressures and life stories. In between visits, you can enjoy the search for other wildlife, of which Agile Gibbons (Hylobates agilis) are some of the noisiest. Gibbons are renowned for being fiercely territorial, claiming their boundaries with energetic displays and calls which can be heard up to 1km away.