Johannesburg:
is the most populous city in South Africa and the third most populous city in Africa, behind Cairo and Lagos. Local residents have nicknamed the city "Jo'burg", "Jozi" and "eGoli". Johannesburg is the provincial capital of Gauteng Province, the wealthiest province in South Africa, and the site of the South African Constitutional Court. Johannesburg is the site of a large-scale gold and diamond trade due to its location on the mineral-rich Witwatersrand mountain range. Johannesburg is also served by Johannesburg International Airport, the largest and busiest airport in Africa and a gateway for international air travel to and from the rest of southern Africa. Johannesburg is not generally known as a tourist destinatio, but the city is a transit point for connecting flights to Cape Town, Durban, and the Kruger National Park. Consequently, most international visitors to South Africa pass through Johannesburg at least once, which has led to the development of more attractions for tourists. Recent additions have centred around history museums, such as the Apartheid Museum and the Hector Pieterson Museum. Gold Reef City, a large amusement park to the south of the Central Business District, is also a large draw for tourists in the city. The Johannesburg Zoo is also one of the largest in South Africa. The city also has several art museums, such as the Johannesburg Art Gallery, which featured South African and European landscape and figurative paintings. The Museum Africa covers the history of the city of Johannesburg, as well as housing a large collection of rock art. The Market Theatre complex attained notoriety in the 1970s and 1980s by staging anti-apartheid plays, and has now become a centre for modern South African playwriting.