Montezuma Castle National Monument is a protected area in Arizona, known for its well-preserved cliff dwellings built by the Sinagua people around the 12th century. The site features a five-story structure that housed around 20 families, showcasing the ingenuity of ancient Native American architecture. Visitors can explore the area through designated trails and view the impressive ruins from a distance. The monument is named after the Aztec emperor Montezuma II, although he had no direct connection to the site. It was established as a national monument in 1906 to preserve its cultural and historical significance, allowing people to learn about the rich heritage of the region.