History & heritage

The George Washington Bridge represented a departure in suspension bridge design. Chief Engineer O.H. Ammann developed a system of stiffening trusses that offered greater flexibility and saved the project nearly $10 million.

Considered one of the world's most scenic mountain drives, the two-lane Going-to-the-Sun Road through Glacier National Park was the first major road to be constructed directly over high mountain terrain.

Built as a suspended aqueduct for barges to cross above the Delaware River, it is the earliest surviving work of John A. Roebling, who designed the Brooklyn Bridge 30 years later.