The Usutu is Swaziland’s major river and provides lots of action. It starts in the vicinity of Amsterdam before it enters Swaziland, where it is also known as the Lusutfu. It carves its way through the mountainous western part of the country before entering the eastern flats. On its lower course it first forms the border between KwaZulu-Natal and Swaziland and then between KwaZulu-Natal and Mozambique. It finally joins up with the Pongola, which becomes the Maputo River in Mozambique.