Pre-Columbian sites are archaeological locations that were established by indigenous peoples in the Americas before the arrival of Christopher Columbus in 1492. These sites provide valuable insights into the cultures, technologies, and social structures of ancient civilizations such as the Maya, Aztec, and Inca. Many of these sites, like Machu Picchu and Teotihuacan, showcase impressive architectural achievements and complex urban planning. They serve as important reminders of the rich history and diversity of the Americas prior to European colonization, highlighting the ingenuity and resilience of the peoples who inhabited these regions.