The Poughkeepsie-Highland Bridge is the oldest surviving steel cantilever bridge in the world and, when built, had the longest truss and cantilever spans. It provided the first and only all-rail route across the Hudson River south of Albany, facilitating the movement of coal eastward and manufactured goods westward for 85 years. Restored as the Walkway Over the Hudson, it provides an outstanding example of adaptive reuse. Its designers were Thomas C. Clarke and Charles MacDonald.