mythic watersnake are remarked upon), for example by members of the Zion Christian Church, include the Kuruman Eye and Boesmanspit. The past ritual significance of the site is subject to on-going archaeological investigation. Rock paintings The rock art on the walls of the cave near its entrance, being researched by David Morris and engraved stones found in the deposit may implicate changing ritual significance. The deep interior as ritual space Aspects of the use of the cave's deep interior reaches are also being considered in these terms. Chazan and Horwitz refer, as Beaumont had done, to the introduction of manuports (unmodified natural stones) "with special sensory properties" by terminal Acheulean hominins, more than 180,000 years ago, to the deep interior of the cave which is characterized by "singular acoustic and visual qualities." They argue that the site provides a "unique and extensive diachronic record of milestones in the development of symbolic behavior" and "evidence to support the position that elements of symbolic behaviour emerged long before the dispersal of modern humans out of Africa." Wonderwerk Cave in literature Julia Martin devotes a chapter to Wonderwerk Cave in her book A Millimetre of Dust, the title of which was inspired by a remark about the site. Michael Cope's anthology Ghaap has sonnets inspired by Wonderwerk Cave. Heritage status Wonderwerk Cave, within a servitude ceded to the McGregor Museum, was declared a National Monument of South Africa in 1993. It was opened to the public, as a site museum, in 1993. In the same year a major graffiti-removal project was carried out. In 2000 new legislation made the site a Provincial Heritage Site. Between 2003 and 2009 it was assessed in terms of the grading system prescribed by the National Heritage Resources Act and graded as a Grade I site (i.e.: of national significance). Declaration as a National Heritage Site followed, being published in the Government Gazette on 12 March 2010. Coupled in a serial nomination with Border Cave and Klasies River Mouth for South Africa's Tentative List for World Heritage inscription, it was re-nominated in its own right for the Tentative List in April 2009. Wonderwerk Cave was one of the 100 sites selected for the 2010 World Monuments Watch by the World Monuments Fund. Documentation with 3D laser scanner In 2005, the Zamani Project documented the Wonderwerk Cave in 3D. A 3D model, panorama tour, images of the point cloud,