The historic ruins of the Inca civilization are primarily found in Peru, with Machu Picchu being the most famous site. This ancient city, built in the 15th century, is a remarkable feat of engineering and architecture, showcasing the Incas' advanced knowledge of agriculture and terracing. The ruins are set high in the Andes Mountains, surrounded by stunning landscapes that contribute to its UNESCO World Heritage status. The Inca civilization left behind a rich cultural legacy, and sites like Machu Picchu continue to attract scholars and tourists interested in their history and achievements.