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Keywords:United States of America, America, U%dS%d, United States, US, USA, Colorado, activity, activities, mining, concepts, concept, conceptual, abandoned, abandonment, architecture, architectural, structures, building, edifice, edifices, residential building, home, residence, house, houses, ghost town, history, brown, North America, dominant color, dominant colour, leaning, tilted, monochrome, black and white
