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Dan_DC: Caterpillar Surface Mining & Technology division, Tucson
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Dan_DC: ASARCO Grupo Mexico office building, 7th Ave. and Helen Street, Tucson
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Dan_DC: the back bowls at Breckenridge, Colo.
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Dan_DC: aerial of Denver
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Dan_DC: Picacho Peak, Ariz.
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Dan_DC: Tucson valley haze at sunset
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Dan_DC: Thunderstorm over Southwest Colorado, Tomichi Creek
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Dan_DC: Over Colorado, snowcaps in June
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Dan_DC: Hoover Dam, Lake Mead
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Dan_DC: Phoenix aerial view_downtown
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Dan_DC: Phoenix
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Dan_DC: Hotel Congress, Tucson
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Dan_DC: Catalina Foothills, Tucson, Ariz.
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Dan_DC: Downtown Tucson branch, Chase Bank
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Dan_DC: Tucson International Airport
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Dan_DC: Downtown Tucson
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Dan_DC: Santa Catalina Mountains, Tucson, Ariz., Dec. 25, 2016
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Dan_DC: Southern California desert
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Dan_DC: Tucson
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Dan_DC: Mount Kimball, Arizona
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Dan_DC: old Chemistry Building, University of Arizona
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Dan_DC: Tucson, Ariz., Tucson Public Library Wilmot Branch
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Dan_DC: Tucson Unified School District, E. 10th St., Tucson
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Dan_DC: City of South Tucson Municipal Complex
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Dan_DC: The Flintstones?
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Dan_DC: Navajo Generating Station, Page, Ariz.
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Dan_DC: Night Depository, Chase Bank
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Dan_DC: Boulder Dam, Nev.
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Dan_DC: Northern Arizona, I-40
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Dan_DC: Northern Arizona