Crystal Mill, Autumn Garb
Though typically referred to as a mill, this historic build was constructed in 1893 to use a horizontal waterwheel on the Crystal River to drive an air compressor for nearby tunnel and mining work. It remained in use until 1917 when the associated mine closed. The "mill" now stands as the most well known of the few historic buildings making up what is left of the town of Crystal.
White River National Forest, Crystal, Colorado, USA.