135 kilometres downstream of the Ruacana Falls are situated the Epupa Falls.
South West Africa 1931, Ruacana Fall. The stamp is existing with inscription in english "postage" and afrikaans "possel".
South West Africa 1976, Ruacana Falls.
Namibia 1996, Ruacana Falls.
Angola 1999, Ruacana Falls.
The stamp was issued in the miniaturesheet "Recursos Hidricos".