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AZSA_002 - Petroglyphs at Signal Hill and Tucson Mountains, Saguaro National Park Arizona.jpg
AZSA_002 -  Evening light defines ancient petroglyphs on boulders at Signal Hill as saguaros lead towards Tucson Mountains, Tucson Mountain District, Saguaro National Park, Arizona, USA --- (4x5 inch original, File size: 7746x6000, 133mb uncompressed)