evidence: The Orange river is 2,300 km (1,430 mi) in length and it is the longest river in South Africa. It is also a major river of Africa. The source of the river is located in the Drakensberg mountain in Lesotho and the river flow westwards through South Africa to the Atlantic Ocean. The river is part of the international borders separating South Africa from Namibia, and South Africa from Lesotho, as well as several provincial borders in South Africa [...] The Orange River map