Machu Picchu (IMAGE) Universidad de San Martin de Porres Caption Iconic sacred citadelle of Machu Picchu, at the edge of the Andes and Amazon, symbol of the largest empire of the Pre Columbian Americas. Credit Jose Sandoval Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.