The Cango Caves are located in the Western Cape Province of South Africa.
The caves were discovered in 1780 by a local farmer. The chamber he first was lowered down into (Van Zyl Hall, which is as long as a football field), is named in his honor. Further exploration was done and a second chamber discovered in 1792. The caves soon became a popular place to visit.
There is an ancient engraving in the Caves: it’s the only piece of cave art in South Africa in a completely dark area. How did the artist prove himself with a light source to work? The engraving shows and elephant superimposed on an eland, and yet, amazingly, you see only the elephant when you view the work from one side, and only the eland when you view it from the other.