The Observatory gates were the entrance to a peace of property, which was used as an observatory from 1948.
On this property, a telescope, equipped with a 74 inch (1.88 m) mirror was established. At the time it was the largest in the Southern hemisphere. Research undertaken here by Dr. A.D. Thackeray and colleagues, led to the doubling of the perceived age and size of the universe.
By and large, light and dust pollution caused a huge problem. Therefore, mandating the move to Sutherland. Above all, the SALT telescope is also situated at Sutherland.
These gates are located on Johann Rissik Drive as you leave Waterkloof Ridge going to Fort Klapperkop.