Walkway Over the Hudson (formerly known as the Poughkeepsie Bridge, Poughkeepsie Railroad Bridge, Poughkeepsie–Highland Railroad Bridge, and High Bridge) is a steel cantilever bridge spanning the Hudson River between Poughkeepsie, New York, on the east bank and Highland, New York, on the west bank. Built as a double track railroad bridge, it was completed on January 1, 1889, and formed part of the Maybrook Railroad Line of the New York, New Haven and Hartford Railroad.
It was taken out of service on May 8, 1974, after it was damaged by fire. It was listed on the National Register of Historic Places in 1979, and its entry updated in 2008. The bridge was designated as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers in 2009.
It was reopened on October 3, 2009, as a pedestrian walkway as part of the new Walkway Over the Hudson State Historic Park. The New York State Bridge Authority owns and is charged with maintaining the bridge structure (as directed by the Governor and Legislature in July, 2010). The park is operated by the New York State Office of Parks, Recreation and Historic Preservation. In 2017, the walkway hosted 593,868 visitors. The park connects the Hudson Valley Rail Trail in Highland to the William R. Steinhaus Dutchess Rail Trail, and forms part of the Empire State Trail.
Read the complete history of the bridge, it's construction, railroad bridge past, dormancy, and rebirth as Walkway Over the Hudson via Wikipedia.