Jo'burg was born as a mining camp, and its downtown area—the oldest part—is a jumbled grid of one-way streets heading in opposite directions reflecting its hasty start to life. Although the city center is experiencing a revival, it's not somewhere that everyone will choose to visit. The attractions in or close to the city center include the Nelson Mandela Bridge, MuseuMAfricA, and the SAB World of Beer in the Newtown area, the Johannesburg Art Gallery, the Standard Bank Gallery, and Diagonal Street in the downtown area, and Constitution Hill, the Civic Theatre, and the Johannesburg Planetarium in Braamfontein.