HERE is an excellent paper by two archeaologists, Michael Chazan & Liora Kolska Horwitz, which describes a large and complex cave structure called Wonderwerk Cave, in Northern Cape Province, South Africa. The cave has thick deposits which have built up over about 2 million years, and it has clear evidence of human symbolic activity dating from about 180,000 years ago up until the present day.
The 3D image is from a comprehensive 3D mapping made of the cave in 2005 (HERE).
