STONE BUS SHELTER Built by the City of Johannesburg Engineers Department in 1934, this is rare example of quality granite mine stone masonry and craftsmanship evident in so many of the cityÕs projects of that period. The bus stop served the trolley buses that ran along Louis Botha Avenue to Norwood, Orange Grove, Bellevue, and Sydenham. The trolley bus system closed in 1986. The chlorination chamber below is part of an early water purification system.