Nyungwe Forest

Listen first. Before you look for anything, just listen. There is the drip of water from leaves high above, steady and soft. Somewhere far off, a bird calls in three rising notes. The air is cool and damp, and it smells of wet soil, moss and something faintly sweet. Under your feet the ground gives a little, deep with fallen leaves. This is Nyungwe, a mountain rainforest in the far southwest of Rwanda, and it is one of the oldest forests on the African continent.

That word, old, matters here. Scientists believe parts of this forest survived the last ice age. Across much of Africa, forests shrank during that long cold and dry period. Nyungwe, high on the mountains, held on. Because it lasted so long, many plants and animals had time to become their own species, found here and almost nowhere else. When you walk these trails, you walk through a place that has been growing, more or less without a break, for a very long time.

Notice how high you are. Nyungwe sits on steep mountain ridges, and the cool air is part of the reason. Mornings often start in mist. The clouds sit low in the valleys and move slowly over the treetops. By midday the light can turn bright and green, then the rain comes back in the afternoon. Visitors are often surprised by the cold. This is equatorial Africa — and yet you may want a jacket.

Here is the first thing many people miss. This forest stands on a great watershed called the Congo-Nile Divide. It is a line of high ground that splits the water of central Africa. Rain that falls on one side of these ridges flows west, toward the Congo River and the Atlantic Ocean. Rain that falls on the other side flows east and north, into the Nile basin. Two of the great rivers of Africa begin their journeys in the same hills.

And there is more. Some explorers and researchers have argued that the most distant source of the Nile itself rises in Nyungwe. The idea is still debated, because the Nile has many headwaters and people measure them in different ways. But think about it for a moment. A small stream in these Rwandan mountains may carry water that, months later, flows past the pyramids of Egypt and into the Mediterranean Sea.

Now look at the plants around you. The giant tree ferns are the easiest to spot. They have thin trunks and wide green crowns, and they look like something from the age of dinosaurs. Look closer at the branches of the larger trees. They are often covered in moss, lichens and small flowering plants. Nyungwe is known for a large number of orchid species. Many are tiny, so you need to slow down and look carefully to find them.

The forest is also famous for its primates. Around thirteen species of primates live here, which is a very high number for one forest. The most famous are the chimpanzees. They live in groups and move fast through the trees, so seeing them takes patience and a good guide. Chimpanzee tracking usually starts very early in the morning, when the groups are calling to each other and beginning to feed.

The chimpanzees are not the only show. Nyungwe is home to large groups of black-and-white colobus monkeys. These monkeys have long white hair on their shoulders and long white tails. In some parts of the forest, they live in unusually large groups, sometimes in the hundreds. Watching a big troop move through the canopy is unforgettable. Branches shake, leaves fall, and flashes of black and white jump across the gaps between the trees.

Keep your eyes on the ground and the lower branches, too. The L'Hoest's monkey is a dark, quiet animal with a white beard around its face. It often walks on the forest floor and along the trails. Many visitors meet it by chance, simply standing by the path. Birds are everywhere as well. Nyungwe is one of the best birding places in East Africa. Many of its species belong only to the Albertine Rift, the chain of mountains along Africa's western Rift Valley.

Now for the second surprise, and it is a high one. Nyungwe has a canopy walkway — a suspended bridge strung between the hills, high above a deep valley. From the bridge you look across the top of the forest, not up at it. You see the crowns of trees that are normally out of view. On a clear morning the forest seems to go on forever. If heights make you nervous, take a slow breath. The walkway moves a little, but it is built for exactly this.

The forest has a modern story as well. Nyungwe became a national park in the early 2000s, and since then Rwanda has worked hard to protect it. In 2020, the conservation group African Parks began to manage it together with the Rwandan government. In 2023, the forest was added to the UNESCO World Heritage list. That listing recognises its old ecosystems and its unusual number of species. For a forest that has already survived an ice age, protection is a new chapter.

Outside the forest edge, the landscape changes quickly. Around the village of Gisakura you can see bright green tea plantations. The bushes are cut flat and neat, and they cover the hills in smooth rows. The line between the tea and the forest is sharp. On one side, an ordered farm; on the other, a dark wall of tall trees. That edge shows how much land people need, and how much the forest depends on careful protection.

The main road across the park runs between the town of Huye in the east and Lake Kivu in the west. Even from the car, the drive is a lesson in this forest. The road climbs, turns, and passes through deep green walls of trees. Monkeys sometimes sit on the side of the road. Mist moves over the asphalt. Drive slowly, keep the windows open if you can, and listen to the forest as you pass.

Before you leave, stand still for one more minute. Feel the cool air on your face and the wet ground under your shoes. Listen again to the water dripping from the leaves. Some of that water will go west toward the Atlantic. Some may go north toward the Nile. As you walk back along the trail, look down for one small orchid, or up for one moving branch... and remember that this forest was here long before you, and with care it will be here long after.