The Mbali River winds through tropical forest and grassland before it reaches the falls. Just before the drop, the river fans out across flat rocks and then tips over the edge all at once. In the rainy season from May to October, the volume of water is enormous - the roar can be heard a long way before you see the falls.
A rainbow often appears in the mist at the base of the falls in the morning, when sunlight catches billions of tiny water droplets hanging in the air. Butterflies gather near the spray because they love the cool, damp air - and because minerals in the mist give them salts they need.
The Boali hydroelectric station nearby uses the power of the falling water to generate electricity that is sent to homes and schools in Bangui. Waterfalls like Boali are a natural source of clean, renewable energy - the water falls on its own and never runs out as long as rain keeps falling.