File:Old Infiernillo Viaduct. On the Callao–Lima–Oroya railroad, in the Peruvian Andes, one of most difficult pieces of railway engineering ever completed.jpg
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Old_Infiernillo_Viaduct._On_the_Callao–Lima–Oroya_railroad,_in_the_Peruvian_Andes,_one_of_most_difficult_pieces_of_railway_engineering_ever_completed.jpg (348 × 326 pixels, file size: 28 KB, MIME type: image/jpeg)