Lascaux cave complex in southwestern France, discovered in 1940 by four teenagers, contains some of the best-known Upper Paleolithic art estimated to be 17,300 years old. By 1955, carbon dioxide produced by 1,200 visitors per day had visibly damaged the paintings. The cave was closed to the public in 1963. Tourists now visit a replica known as Lascaux II, which opened in 1983 & now draws more than 250,000 people each year. . . . . ღTrish W ~ http://www.pinterest.com/trishw/ . . . .