I love the iron and steel constructs built between the American Civil War and the First World War. Many were built by the railroads, the wonder train sheds of Europe. But the US has its share of railway architecture. The St. Croix River Soo Line High Bridge is a magical construct of steel latticework. I never tire of taking a boat down to the bridge just to marvel at how, more than a century ago (in 1909) folks made such a wonderful and beautiful structure. I love how delicate the lacework pattern of iron and steel can look.
Make sure the map is on satellite and zoom in on the marker to see a great reflection of the bridge in the river.