Witwatersrand, Gauteng, South Africa
In the southern half of Gauteng, the Witwatersrand area is an older term describing a 120 km wide oblong-shaped conurbation from Randfontein in the West to Nigel in the East, named after the Witwatersrand, a geologically and economically important series of low ridges and their associated plateau that greater Johannesburg developed on. This area is also often referred to simply as "Witwatersrand", "the Rand" or "the Reef" (archaic, after the gold reefs that precipitated the development of the area), and was the "W" in PWV, the initial name for Gauteng. It has traditionally been divided into the three areas of East Rand (governed by the Ekurhuleni Metropolitan Municipality), Central Rand (approximately today's Johannesburg Municipality) and West Rand.
Johannesburg, South Africa
The Pretoria-Witwatersrand-Vereeninging metropolitan area has a population of over 10,058,121 people.