number of the markings are over 30,000 years old. They were looking at mineral layers that were covering the images, and tracing the amount of radioactive uranium in them. This technique did not give an exact date, but it narrowed down the time when the images were possibly painted. The work suggests that early settlers in Asia were creating their own artwork at the same time, or even earlier, than artwork of this kind was being created in Europe. The caves were of interest to the British naturalist Alfred Russel Wallace. Wallace visited the East Indies during the period 1854 to 1862 although he appears not to have spotted the artwork. Wallace discusses his visit to the region in his well-known book The Malay Archipelago first published in 1869. Journal Science announced that hand print in Maros Cave by mouth spraying dye is in the sixth position of the 2014’s top ten science breakthroughs and is called as Indonesian Cave Art. The art of drawing in (Maros Cave) rocks has same old with inhabitant of the European land. Natural features Maros Regency is famous for its karst hills and cliffs which have been referred to as "The Spectacular Karst Towers". The Karaenta Nature Reserve, best known for the Moor macaque monkeys (Macaca maura) in the park, is located in the Cenrana district (kecamatan) in the regency. Moor macaques are endemic to Sulawesi and are considered to be endangered because the remaining numbers are believed to be limited. Caves The longest known cave in Indonesia is the Salukangkallang cave (27-kilometer in length). The cave is mostly in the Samangki Village Tourist Area (Kawasan Desa Wisata Samangki), but the entrance to the cave is in Labuaja village, nearby to Samangki village. References Regencies of South Sulawesi Archaeological sites in Indonesia World Heritage Sites in Indonesia Prehistoric Indonesia