Tusayan Ruins, or Tusayan Pueblo, is an approximately 800-year-old archaeological site in Grand Canyon National Park and one of Arizona’s major archaeological sites. Its remains form a small U-shaped pueblo with living quarters, storage rooms, and a kiva. Tree-ring studies show it was occupied for only about twenty years beginning around 1185, giving it unusual value as evidence from a narrow span of time. The site is seen as preserving the survival of an isolated Pueblo II culture into the Pueblo III era, capturing a transitional moment in the region’s ancestral Pueblo history. It was excavated in 1930, preserved further in 1948 and 1965, and listed on the National Register of Historic Places in 1974.