Johannesburg, South Africa's commercial metropolis is a remarkable and rather daunting city where high-rise buildings cluster at the city centre and suburbs sprawl outwards. Green and prosperous enclaves dotted with turquoise swimming pools contrast with dusty African townships. Johannesburg's best shopping malls and hotels can be found in the attractive northern areas. Sight seeing includes Museum Africa, which focuses on the cultures of the indigenous peoples, and the City Art Gallery rich in Pre-Raphaelite and Impressionist paintings.