Chauvet Cave paintings discovered 1994 Paleolithic 40,000-10,000 BCE Google Image Result for http://2.bp.blogspot.com/-Vk5mK4qKV6w/TdsLPLkuYYI/AAAAAAAABFY/ejmM_oXBxZc/s640/634x375chauvet-cave-rhino-painting_2351.jpg
Beautiful drawing of horses facing one another in Chauvet Cave in France. Art dates back 30,000 to 33,000 years. Seeing their artistry in the film "Cave of Forgotten Dreams" by Wernor Herzog is as close as one can get to the art as the caves are not open to the public.
Stone Age Art ~ Amazing page comparing Petroglyph and Pictographs styles found on different continents. While I don't romanticize such things, it struck me strongly when looking at World Heritage Sites that human beings in so many different parts of the world painted, carved, or in some way inscribed their humanity onto the walls of the earth.