Lascaux is a complex cave system in southern France that is highly famous for Paleolithic cave drawings. To preserve these drawings, which are some of the oldest drawings in the world, people may only visit a replica of the site. No one really knows the purpose of the cave art, but the paintings are mostly of large animals.
A photo that represents the Lascaux paintings can be found at this website: http://www.flickr.com/photos/williamcromar/4702320449/. The flickr username of the author of the photo is williamcromar.