3) Ponte City Apartments, Johannesburg – 173 m (568 ft)
Ponte City Apartments is located in the Hillbrow neighborhood of Johannesburg, South Africa. This 54-story building was built in 1975. It is the tallest residential skyscraper in Africa. The building has a cylindrical shape and has an open center. The sign on top of the building is the largest sign in the Southern hemisphere.