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High Trestle Trail Bridge near Des Moines, Iowa; between Madrid and Woodward, Iowa (north of Des Moines, Iowa); it is a part of the High Trestle Trail for pedestrians and cyclists; located near mining shafts, the bridge decking represents the view through a mine shaft; built on the piers (trestles) of a former railway bridge; opened in 2011 ...
the lower one is the original bridge from 300 years ago. It was superceded by the upper (wider) one a hundred years later. The newer bridge also cuts out a rather tricky incline on the approaches on either side of the gorge. The bottom bridge is the abandoned one