The Inca civilization built the Machu Picchu site in Peru. This remarkable archaeological site, often referred to as the "Lost City of the Incas," was constructed in the 15th century during the reign of Emperor Pachacuti. Machu Picchu served as a royal estate or religious site and is renowned for its sophisticated dry-stone construction, agricultural terraces, and impressive architecture. Rediscovered in the early 20th century, it has become a UNESCO World Heritage Site and a significant symbol of Inca culture, drawing countless visitors interested in history and ancient engineering.