As soon as it warms up, I would love to make a trip up to Poughkeepsie to see the recently opened Walkway Over the Hudson. Today, this state park is the world's largest pedestrian-only bridge. In the past, however this was a railway bridge, as The New York Times described it, "The Poughkeepsie-Highland Railroad Bridge, built in the late 19th century to link New York and New England to the coal beds of Pennsylvania and the West, is a marvel of Industrial Revolution engineering. It fills the sky over the Hudson River, a muscular lattice of trusses and struts on giant footings, a survivor from a long-gone era before bridge mediocrities like the Tappan Zee."
Photo via jmenard48/Flickr.