Thanks for sharing gavvet. Thought about visiting it a few times as it is only a 2 hours drive from me. For those that don't now the story of the Cradle of Humankind here's a quick intro.

The Cradle of Humankind is a paleoanthropological site about 50 kilometres northwest of Johannesburg, South Africa in the Gauteng province. Declared a World Heritage Site by UNESCO in 1999, the site currently occupies 47,000 hectares (180 sq mi) and it contains a complex of limestone caves.
The Sterkfontein Caves contain the discovery of a 2.3-million-year-old fossil Australopithecus africanus (nicknamed “Mrs. Ples”), found in 1947 by Robert Broom and John T. Robinson. The find helped corroborate the 1924 discovery of the juvenile Australopithecus africanus skull, “Taung Child”, by Raymond Dart, at Taung in the North West Province of South Africa, where excavations still continue.