Pueblo Bonito, Chaco Culture National Historical Park (IMAGE)

University of Arizona

Pueblo Bonito, Chaco Culture National Historical Park

Caption

This photo from the 1930s shows the back wall of Pueblo Bonito, the largest structure found in Chaco Canyon, New Mexico. Archaeologists estimate the intact structure was 5 stories high and had about 500 rooms. University of Arizona tree-ring studies of building's wooden beams revealed the structure was built in phases from 850 to 1120.

Credit

George A. Grant/ National Park Service

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