File:Lupercal grotto.jpg

Author: Director of the Colosseum and the Roman Forum, Government of Italy

URL: http://news.nationalgeographic.com/news/2007/11/071120-rome-grotto.html

Fair use rationale:
 * 1) It depicts a non-accessible, historic location, the Lupercal grotto
 * 2) It depicts an important, non-reproducible aspect of a historic location, the Palatine Hill
 * 3) The image is no larger, and of no higher quality, than required for its use in articles.
 * 4) It was released by an organization of the Government of Italy for educational purposes.
 * 5) Its use on Wikipedia will not cause loss of revenue to the copyright holder, if any
 * 6) It is used to describe the specific location pictured and to discuss the method by which the picture was taken.