The Inca Empire, officially known as the Realm of the Four Parts, was the largest empire in pre-Columbian America. Flourishing between the early 1400s and the mid-1500s, the Inca civilization emerged in the Peruvian highlands in the early 13th century, with its administrative, political, and military center in Cusco, modern-day Peru. From 1438 to 1533, the Incas integrated a large portion of western South America, including parts of modern-day Peru, Ecuador, Bolivia, Argentina, Colombia, and Chile. The empire spanned a vast territory of mountains, jungles, and deserts, covering approximately 772,000 square miles.
The Inca Empire is renowned for its sophisticated engineering, architecture, and social organization. They constructed an extensive road system, the Qhapaq Ñan, stretching over 25,000 miles, to connect the empire. They were also masters of agriculture, developing terraced farming and irrigation systems that are still in use today. Key attractions include Machu Picchu, a well-preserved citadel built around 1450, Sacsayhuamán, known for its massive stone walls, Ollantaytambo, a living Inca city, and Pisac, famous for its agricultural terraces. The Inca Empire declined following the arrival of the Spanish conquistadors in 1532, with the last Inca stronghold conquered in 1572. However, the legacy of the Inca endures in the culture and traditions of Andean communities, as well as in the many ruins and archaeological sites that continue to draw visitors from around the world.