|Altamira Cave, in the north of Spain. Image from Science & Technology|
Altamira Cave has had a long history of closing and opening to the public since its discovery in 1879. Access policies are about to be revised, again. However, according to recent studies carried out by Saiz-Jimenez and other scientists (see the article on Science 7 October 2011, pages 42-43) opening the cave for visitors would have disastrous effects.
Local authorities think otherwise, however, as the region has become an important touristic hub. There are some interesting points to debate here, such as how to define an access policy that will not compromise the cave or local development. Another important point would be the validity of the replica, that is, whether it provides an 'authentic' experience for visitors.
See a good discussion here For Cave's Art, An Uncertain Future, by Carmen Drahl