These are all areas on the urban periphery, known as townships, of which the most famous is Soweto.  
Among its notable landmarks are Markhams Building and the massive business structure known as Corner House.  This city is the capital of the Gauteng province, and the largest of the ten cities that lie in the Witwatersrand.  Alexandra, its nation's poorest area lies within its suburbs as does the bleak area of Booysens Reserve.  These are all areas on the urban periphery, known as townships, of which the most famous is Soweto.  Founded in 1886 after the discovery of nearby gold, FTP, name this largest city in South African.
Among its notable landmarks are Markhams Building and the massive business structure known as Corner House.  
Johannesburg