Tsodilo Hills.

Rising abruptly from the flat Kalahari sands of northwest Botswana, Tsodilo Hills holds more than 4,500 rock paintings across four hills known to the San as the Male, Female, Child and North Hill, earning it the nickname "the Louvre of the Desert" and a UNESCO World Heritage listing in 2001. Some paintings date back over 20,000 years, depicting eland, rhino and human figures believed to hold deep spiritual significance for the San people, who consider the site sacred and still visit for ceremonies. A small community-run museum and licensed local guides, required to access the main painting sites, add context to a place archaeologists regard as one of the most important rock art concentrations in Africa.