Tsodilo is a UNESCO World Heritage Site located in northwestern Botswana.It was inscribed in 2001 due to its unique religious and spiritual significance to local peoples, as well as its unique record of human settlement over many millennia. It contains over 4,500 rock paintings in an area of approximately 10 km² within the Kalahari Desert. A recent discovery of 70,000-year-old artifacts and a python's head carved of stone appears to represent the first known human rituals.