Nouabalé-Ndoki National Park is a legend among nature lovers: one of the most pristine tropical rainforests left on the planet, so intact that explorers dubbed it 'the last Eden'. Its more than 4,000 km² of deep forest in northern Congo are home to healthy populations of forest elephants, western lowland gorillas and chimpanzees, in a place where humans have left barely a trace.
Here lies the legendary Goualougo Triangle, home to 'naive' chimpanzees that never learned to fear humans and, instead of fleeing, come closer to watch the researchers. Here is Mbeli Bai, the swampy clearing where the world's longest-running study of lowland gorillas takes place, and Wali Bai, with its viewpoint over elephants and buffalo. And it is all part of the Sangha Trinational, a huge cross-border complex declared a World Heritage Site.
This guide explains how to visit this remote, protected park: gorilla tracking at the Mondika centre, wildlife watching from the bai platforms, how to get there via Ouésso and Bomassa, which permits you need and when to go. Nouabalé-Ndoki is neither an easy nor a cheap trip, but it is an unrivalled immersion in the wild heart of Africa, one of the last great truly intact rainforests in the world.
Nouabalé-Ndoki was created in 1993 following the explorations of biologist Mike Fay and the Wildlife Conservation Society, which revealed to the world a rainforest almost untouched by humans, inhabited by apes that knew no fear of people. Photographed by National Geographic as 'the last place on Earth', it became a symbol of the Congo's virgin rainforest. In 2012 it joined parks in Cameroon and the Central African Republic to form the Sangha Trinational, a World Heritage Site. Today it is managed by the WCS with the Congolese State, in one of the most important conservation projects in Central Africa. Its full story is told on our history page.
Read the full history ↓The deep Congo: the immense equatorial rainforest of the Congo Basin, with Odzala-Kokoua and Nouabalé-Ndoki, 'the last Eden', where lowland gorillas and forest elephants gather in the swampy clearings known as bais.
Read the history of The northern rainforest and the great parks →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
In the early 1990s, northern Congo was one of the last big blank spaces on the map: a vast rainforest with no roads and almost no human presence, in the heart of the Congo Basin. That is where American biologist Mike Fay, of the Wildlife Conservation Society (WCS), and other explorers headed to document a forest that almost nothing was known about. What they found left them stunned: a practically untouched rainforest, with dense populations of forest elephants, gorillas and chimpanzees that had never had contact with humans.
The most astonishing detail was the 'naive' chimpanzees of the Goualougo area: since they had never been hunted, they did not flee from people but came closer to watch them with curiosity, a behaviour found nowhere else in the world. That forest seemed like a place frozen in time, from before the human footprint. Photographer Michael 'Nick' Nichols captured it for National Geographic, and the feature —and later the book about Fay's journey— made it famous as 'the last place on Earth' or 'the last Eden'.
That discovery had immediate consequences: the treasure had to be protected before logging, which was already advancing across northern Congo, reached it.
As a result of those explorations and the push from the WCS together with the Congolese Government, Nouabalé-Ndoki National Park was officially created in 1993, with more than 4,000 km² of protected primary rainforest in the far north of the country, in the Sangha department. This was the birth of one of the most ambitious conservation projects in Central Africa: protecting an almost untouched rainforest and its populations of great apes and elephants.
A famous episode from those early years was the Goualougo Triangle, a sector of some 250 km² in the south of the park that was initially left outside its boundaries because it was part of a logging concession. After years of scientific and conservation campaigning —the area was home to the 'naive' chimpanzees and to some of the oldest trees in the forest—, the Triangle was finally brought under the park's protection, saving it from logging.
From the start, management sought to combine anti-poaching patrols with scientific research and work with local communities, among them the Baka peoples, hunter-gatherers with an age-old knowledge of the forest, whose relationship with the park has been central to its history.
Nouabalé-Ndoki soon became one of the great laboratories of great ape science. In 1995 the Mbeli Bai Study began, in a swampy clearing in the southwest of the park, and over the years it became the longest-running dataset in the world on western lowland gorillas. From an observation platform, generations of researchers identified individual gorillas, followed their family groups and documented births, deaths and migrations. Thanks to that constant watch, poaching practically disappeared from the clearing and the observed population came to double.
In the south of the park, the Mondika centre specialised in habituating and studying lowland gorillas, and from 2005 it opened the door to very careful gorilla tourism. And in the Goualougo Triangle, the Goualougo Triangle Ape Project documented the astonishing tool culture of its chimpanzees, which can make and use 'kits' of sticks to fish for termites and extract honey.
This build-up of knowledge made Nouabalé-Ndoki a global scientific benchmark and showed that long-term research is, in itself, one of the best conservation tools: where there are researchers watching, poachers stay out.
The value of Nouabalé-Ndoki soon reached beyond Congo's borders. The park's rainforest runs seamlessly into that of its neighbours: to the north, Dzanga-Ndoki National Park in the Central African Republic, and to the northwest, Lobéké National Park in Cameroon. The three countries agreed to manage that huge block of continuous forest in a coordinated way, creating the cross-border complex known as the Sangha Trinational (TNS).
In 2012, Unesco inscribed the Sangha Trinational on the World Heritage List, recognising its outstanding natural value: one of the largest expanses of intact tropical rainforest on the planet, with complete ecological processes and healthy populations of forest elephants, gorillas and chimpanzees. Cooperation between the three countries lets wildlife move freely across an immense territory and coordinates the fight against poaching on both sides of the borders.
For conservation, the Trinational is a model of how nature ignores political borders and of how international cooperation can protect ecosystems that no single country could safeguard on its own.
Today Nouabalé-Ndoki is managed by the park's Foundation, a partnership between the Wildlife Conservation Society and the Government of the Republic of the Congo that runs patrols, research, tourism and relations with communities. Rangers patrol a vast and difficult territory to curb poaching for ivory and bushmeat, the biggest threat to forest elephants, a species that has suffered a dramatic decline across Central Africa.
The pressures are no small matter: expanding logging and mining in the buffer zones, new roads that make poaching easier, and the challenge of making sure local communities, including the Baka peoples, benefit from conservation and take part in it. Gorilla tourism, still in its early days and very low in volume, is seen as a source of income that gives economic value to the living forest.
From the amazement of the 1990s explorers at 'the last Eden' to today's World Heritage status, the story of Nouabalé-Ndoki is one of a determined effort to keep one of the world's last great virgin forests intact. In an age of accelerating deforestation, the fact that a place like this is still standing —with its gorillas, its elephants and its chimpanzees that do not fear humans— is almost a miracle that must go on being protected.
