Places on earth advised not to visit, 9- lascaux cave france

Prehistoric paintings were found in Lascaux Cave in 1940, and this cave became a tourist site after World War II. And the carbon monoxide released by the visitors' breath began to destroy the paintings of the caves, which are now classified as a World Heritage Site by UNESCO, and as a result the cave was banned from visitors in 1963, and only researchers and heritage protectors were allowed to enter it.