Machu Picchu at Risk (IMAGE) University of the Basque Country Caption There is a wide variety of biocolonizer species that are putting the conservation of the granite at Machu Picchu at risk. Credit Héctor Morillas / UPV/EHU 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.