Noted sites containing early art include Tassili n'Ajjer in southern Algeria, Tadrart Acacus in Libya (A Unesco World Heritage site), and the Tibesti Mountains in northern Chad. Rock carvings at the Wonderwerk Cave in South Africa have been dated to this age. Contentious dates as far back as 29,000 years have been obtained at a site in Tanzania. A site at the Apollo 11 Cave complex in Namibia has been dated to 27,000 years.