Chaco is a historical region located in the northwestern part of New Mexico, known for its significant archaeological sites. It was once the center of the Chaco Canyon culture, which thrived between AD 900 and 1150. The area is famous for its impressive stone structures, including multi-story buildings and ceremonial kivas, which were used for religious and social gatherings. The Chaco Culture National Historical Park preserves these ancient ruins and offers insights into the lives of the Ancestral Puebloans. The park is a UNESCO World Heritage Site, attracting visitors interested in history, archaeology, and the unique landscape of the Southwest United States.