Black and white lantern Slide of Pungwe Falls - British South Africa. Part of Box 288, British South Africa. Boswell Collection. Slide number 19 Pungwe Falls - Pungwe River (Portuguese: Rio P???gu?) is a 400 km long river in Zimbabwe and Mozambique. It rises below Mount Nyangani in the Eastern Highlands of Zimbabwe and then flows eastward through the Manica and Sofala provinces of Mozambique. It then empties to the Mozambique Channel in Beira, forming a large estuary. It is one of major rivers of Mozambique and often causes floods.