📁 峡谷国家纪念碑
Walnut Canyon National Monument was established in 1915 to preserve the Sinaguan archeological sites in the area, which date from 1100 to 1225 AD.
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Walnut Canyon National Monument was established in 1915 to preserve the Sinaguan archeological sites in the area, which date from 1100 to 1225 AD.