The Vaal Triangle was formed by the city of Vereeniging and the towns of Vanderbijlpark and Sasolburg. It was known as the Industrial hub of South Africa in the latter half of the twentieth century. More recently, particularly in the tourism industry, the use of the term Vaal has become common. The Vaal comprises the many towns and resorts which are situated in the vicinity of the Vaal River and the Vaal Dam. Although most of these are situated in the Sedibeng District Municipality (shown in yellow below), it is also prudent to include the towns in the Metsimaholo, Ngwathe and Potchefstroom Municipalties.
This section gives a brief history of the larger and more well-known towns and cities in the Vaal area.