This week’s challenge submission comes from a recent bike ride on the High Trestle Trail between Madrid and Woodward, Iowa, USA. The paved trail was built on a former Union Pacific railroad bed. We planned two short, 2.5 mile rides from Woodward – late afternoon and dusk – to see the highlight of the trail, the 1/2-mile, 13-story high bridge across the Des Moines River valley, making it one of the largest trail bridges in the world. Forty-one steel cribbings, representing the coal mining industry for which the region was once known, encompass the bridge’s path.

After the daytime observation, we made our way back to Woodward for a wonderful dinner at the Whistlin’ Donkey Sports Bar and Grill. Then, we repeated our trip at dusk for a special treat. Twenty-three of the 41 cribbings are illuminated with blue lights, marking the riverbed below. Because each cribbing is angled differently, the lights give the impression that you are moving through a time warp and the illusion that the cribbings are curved. The following video of the entire half-mile crossing shows this effect. Hope you enjoy the ride!

Here are more entries to this week’s photo challenge.