The Sterkfontein Caves, located in South Africa, are a UNESCO World Heritage Site and part of the Cradle of Humankind. Famous for their rich fossil discoveries, they’ve provided crucial evidence of early human evolution, including the famous Australopithecus africanus fossil known as "Mrs. Ples" and the nearly complete skeleton of "Little Foot." These limestone caves offer guided tours and insights into humanity’s ancient past, making them a key archaeological and tourist site.