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View across Black Cañon. The grand walls in perspective, No. 2 from the series "Geographical Explorations and Surveys West of the 100th Meridian"
From the collection of Art Institute of Chicago. Free to download, adapt and use — no permission needed.
Credit lineView across Black Cañon. The grand walls in perspective, No. 2 from the series "Geographical Explorations and Surveys West of the 100th Meridian". 1871. Timothy O'Sullivan (American, born Ireland, 1840–1882), commissioned by George Wheeler for the War Department, Corps of Engineers, U.S. Army. The Art Institute of Chicago, Photography Gallery Fund. CC0.