Chaco Canyon is a UNESCO World Heritage Site located in northwestern New Mexico, USA. It is known for its well-preserved ancestral Puebloan ruins, including massive stone buildings, ceremonial structures, and intricate petroglyphs. The area was once a major center of ancestral Pueblo culture between 850 and 1250 AD, known for its complex social organization, advanced architecture, and ceremonial practices. Research in Chaco Canyon includes archaeology, anthropology, and environmental studies to understand the history, culture, and significance of the ancient Puebloan people who inhabited the area. Studies have focused on topics such as urban planning, astronomical observations, trade networks, and social relationships within the Chacoan society.