Machu Picchu, the ancient Inca citadel located in the Andes Mountains of Peru, has a number of synonyms and alternative names that describe its cultural significance and historical importance. One of the most popular is "The Lost City of the Incas," which refers to the fact that the site was abandoned by the Inca people and hidden from the outside world for centuries before being rediscovered in 1911. Other synonyms for Machu Picchu include "The Sacred City," "The City in the Clouds," and "The Crystal City." Despite the different names and interpretations, Machu Picchu remains one of the most famous and awe-inspiring archaeological sites in the world.