# Machu Picchu, Peru

Machu Picchu is a lost treasure of the 15th century and a rare citadel discovered high in the Andes mountains above the Peruvian Sacred Valley. Astonishingly, it is one of the only pre-Columbian ruins found nearly intact, featuring evidence of former plazas, temples, agricultural terraces, and homes. Archaeologists believe the citadel was built as an estate for the Inca emperor Pachacuti in around 1450 in polished drystone walls.[1]

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