The Casa Grande Ruins National Monument is one of about 360 areas managed by the National Park Service and was preserved due to its outstanding archaeological values. The first farmers of the American Southwest are referred to as the Hohokam by archaeologists. The Hohokam mixed ground-up caliche with water to produce a sticky mud that was used as a multi-purpose construction material.
Click on the next two images to enlarge them enough to read about the largest structure in the ruins. Click on your browsers back arrow to return to the blog.
The opening in the top left corner of this image matches the lunar alignment marked on the above diagram.
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