The Luapula River is a section of Africa's second-longest river, the Congo. It is a transnational river forming for nearly all its length part of the border between Zambia and the DR Congo. It joins Lake Bangweulu (wholly in Zambia) to Lake Mweru (shared between the two countries) and gives its name to the Luapula Province of Zambia.
The Luapula drains Lake Bangweulu and its swamps into which flows the Chambeshi River, the source of the Congo. There is no single clear channel connecting the two rivers and the lake, but a mass of shifting channels, lagoons and swamps, as the explorer David Livingstone found to his cost. (He died exploring the area, and one of his last acts was to question Chief Chitambo about the course of the Luapula.) The channel boldly marked as the 'Luapula' and confidently shown on many maps flowing south out of Lake Bangweulu at 11°25'S 29°49'E can be seen on satellite images such as Google Earth to actually peter out into green vegetation around 11°46'S 29°48'E.
Below the Bangweulu swamps and floodplain the Luapula flows steadily in an arc south-west turning north-west then north, with some rapids and well-known set of cataracts, Mambilima Falls near the main road. A far less well-known site is Tangwa, about 40 km south where the river has eroded a gap through rocky hills carving huge caves, arches, and potholes, and leaving giant boulders, including two balancing rocks called 'God's Corn Bin'.
From the Chembe Ferry to Lake Mweru, the 300 km long Luapula Valley has a higher rural population than the plateau through which it cuts to a depth of up to 500 m. The river is known for this valley and for its long thin delta entering Lake Mweru, usually referred to as the Luapula Swamps. The well-populated part of the valley starts north from Mambilima Falls, and along the rest of its length is nicknamed 'Mwapoleni Road', after the Chibemba greeting called out as people pass each other.