Lake Bunyonyi is one of those places that seem too beautiful to be real: a serene, extremely deep lake dotted with 29 green islands, surrounded by terraced hills that drop down to the water like a natural amphitheatre. Its name means 'place of many little birds', and a constant concert of birdsong rises from its shores and reeds. At almost 2,000 metres above sea level, it is cool, peaceful and — unlike nearly every other lake in Africa — safe for swimming: there are no crocodiles, no hippos and no bilharzia.
All of this has made it the great place to unwind in southwest Uganda, the restorative reward after the effort of the Bwindi gorilla trek, just a few hours away. Here you don't have to 'do' anything: the main activity is relaxing. Canoeing among the islands at sunset, swimming in its clean waters, walking through the hills among fields and Bakiga villages, or simply sitting and gazing at the lake from a lodge are plans enough to fill your days.
This guide explores Lake Bunyonyi from a practical angle: what to do on its waters and islands, the curious and sometimes dark history of some of them (such as 'Punishment Island'), why it is safe to swim, how to get around by canoe, where to stay on the water and how to combine it with the gorillas and with Rwanda. For anyone looking for beauty, calm and a breather in the middle of an intense trip, Bunyonyi is one of the most charming corners of all East Africa.
Lake Bunyonyi fills a valley dammed thousands of years ago by lava from a neighbouring volcano, which gave it its irregular, finger-like shape and its 29 islands. According to many sources, it is the second-deepest lake in Africa (although its exact depth is debated). Its islands hold intense stories: Akampene, 'Punishment Island', where unmarried pregnant girls were once abandoned; Bwama, where a British missionary set up a leprosy hospital in the early 20th century, now a school. The surrounding hills, sculpted into terraces by the Bakiga people, are among the most densely farmed in Uganda. Its full history is told on our history page.
Read the full history ↓Uganda's most beautiful corner: almost half of the world's mountain gorillas live in Bwindi's World Heritage forest, surrounded by crater lakes, terraced farmland and the Virunga volcanoes.
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Origins, formation and what the sources say.
Lake Bunyonyi owes its strange, beautiful shape to geology. It sits in the highlands of south-western Uganda, a mountainous, volcanic region close to the Virunga range, on the edge of the Albertine Rift Valley. According to the most widely accepted explanation, the lake formed thousands of years ago when lava from a nearby volcanic eruption dammed a river in a winding valley, trapping the water between the hills. As the valley and its branches flooded, the low-lying ground was submerged, while the hilltops stayed above the water and became the 29 islands that dot the lake today.
That explains its irregular, elongated and branching shape, like a hand with many watery fingers reaching in between the mountains, and the abundance of islands of every size. It also explains its great depth: because it fills a sunken valley between mountains, the lake reaches remarkable depths. Many local sources describe it as the second-deepest lake in Africa, with figures running to hundreds of metres, although the scientific literature usually gives more modest values; the exact figure is still debated, but there's no doubt that it is a deep and unusual lake.
Lying at almost 2,000 metres above sea level, Bunyonyi enjoys a cool, mild climate, very different from the heat of the lowlands. That altitude has important consequences: it keeps the area free of malaria, and the lake is also free of bilharzia and has no crocodiles or hippos. That makes it one of the few lakes in Africa where you can swim safely, a rarity that is now a key part of its appeal.
The hills around Lake Bunyonyi have long been settled and farmed by the Bakiga people (the 'Kiga'), highland farmers known for their hard work and strong sense of identity. The Bakiga turned these steep slopes into one of the most spectacular farming landscapes in Uganda: they carved them into endless terraces climbing from the lakeshore to the hilltops, making use of every metre of fertile soil and holding back erosion on such sloping ground. The result is an amphitheatre of green steps falling away towards the water.
On these terraces the Bakiga grow sorghum, potatoes, sweet potatoes, beans, peas and vegetables, in one of the most densely populated rural regions of the country. Population density is in fact so high that it has historically put pressure on the land, and in the 20th century it led to Bakiga being resettled in other parts of Uganda. Life around the lake is still deeply rural: people get around in hand-carved dugout canoes, children paddle to school, and the markets and villages keep a slow, traditional pace.
The lake's name itself, Bunyonyi, means 'place of many little birds' in the local language, a reference to the abundance of birds on its shores and islands. That poetic name reflects the close bond between the people, the landscape and the natural life of the place. Bakiga culture (their dances, music, crafts and community life) is now part of what draws travellers to Bunyonyi, through visits and community tourism projects.
Of Bunyonyi's 29 islands, none holds a story as intense as Akampene, 'Punishment Island'. It is a tiny islet that hides one of the darkest traditions of the Bakiga past. In the old days, when an unmarried young woman became pregnant (seen as a serious disgrace for the family, which also lost the chance to collect a bride price for her), she was taken by canoe and abandoned on this little island, alone and with nothing.
There she was left to die of hunger and cold, or to drown trying to swim to the shore, since many women could not swim. The custom had a cruel double purpose: to punish the girl and to serve as a warning to the other young women of the community. Sometimes a poor man who couldn't afford to pay a bride price would go to the island to 'rescue' one of these women and marry her, which gives an idea of how harsh and unequal those social rules were.
The practice was abandoned decades ago, with social change and the arrival of Christianity and education, but the island remains a moving reminder of a difficult past. Today local boatmen point it out on canoe trips and tell its story, which helps visitors understand the traditions of the region and how its society has changed. It is one of the most memorable (and sobering) stops on a trip around the lake.
Over time, the natural isolation of Bunyonyi's islands gave them a wide range of uses, some of them surprising. In the early 20th century the British doctor and missionary Leonard Sharp arrived in the region and was captivated by the beauty of the lake. Sharp saw the islands' isolation as an opportunity to treat a disease that was greatly feared at the time: leprosy. On Bwama, one of the largest islands, he set up a centre and a hospital for leprosy patients, taking advantage of its position in the middle of the water to care for the sick and keep them isolated at the same time, as they were shunned by society.
Sharp himself settled on a neighbouring island, Njuyeera (known as 'Sharp's Island'), and from there drove his medical and missionary work. The Bwama leprosy hospital ran for decades and was an important treatment centre in south-western Uganda, at a time when leprosy had no easy cure and those who had it were feared and cast out. As in much of Buganda and the south-west, the arrival of missionaries also brought schools, churches and deep social change.
Eventually, once modern treatments had ended leprosy's status as a major public health problem, the Bwama facilities were converted, and today the island is home to a school. So Bunyonyi's islands went from places of punishment and isolation to places of education and community, mirroring how local society changed over the course of the 20th century.
In recent decades Lake Bunyonyi has become one of the best-loved destinations in south-western Uganda, above all as a place to rest. Its closeness to the region's big attractions (gorilla trekking in Bwindi, the gorillas and golden monkeys of Mgahinga, the border with Rwanda) made it the ideal place to recharge: the perfect spot to relax for a couple of days after the effort of trekking, take in the experience and get your strength back before moving on.
Its unique conditions (water that's safe to swim in, a cool climate, no malaria and a landscape of serene beauty) have led lodges and places to stay to spring up on its islands and shores, from legendary backpacker spots to charming lodges. Activities revolve around calm: canoe trips between the islands, swims in the lake, walks over the terraced hills, visits to Bakiga communities, birdwatching and, above all, the pleasure of doing nothing in front of an exceptional view.
From the valley dammed by lava to the terraces carved by the Bakiga, from the grim Punishment Island to the leprosy hospital turned school, Lake Bunyonyi brings together geology, culture and history in a setting of rare beauty. For travellers on the demanding gorilla circuit of the south-west, Bunyonyi is a breath of calm, a place of quiet beauty and well-earned rest: one of the most charming and human corners of all Uganda.
