National Historic Landmark-Alkali Ridge

This large area, comprising some 70 square miles, contains vestiges of the earliest traditionally recognized Puebloan architecture - above-ground dwellings built around a central courtyard with associated underground kiva.

The ridge is considered the type location of the Pueblo II period (A.D. 900-1100), a transitional time between life focused within scattered pit dwellings and a true sedentary life-style with multistory structures, irrigation agriculture, and high-quality ceramics.

Courtesy National Park Service National Historic Landmarks

Photo by Visiting the Ancients.com

http://visitingtheancients.com/Alkali_Ridge_UT.html