The first concrete-steel composite arch bridge in the USA that links the states of Nevada and Arizona by spanning the Colorado River is near which other man-made construction?
Which German-American structural engineer and designer was Chief Engineer for the construction of the Golden Gate Bridge, San Francisco?
Which construction, designed by Finnish-American architect Eero Saarinen and structural engineer Hannskarl Bandel in 1947, that stands 630 feet (192 m) tall and is 630 feet (192 m) wide at its base, is called "the tallest monument in the USA"?
The first iron suspension bridge of its kind in the world, which established the potential of suspension bridge technology to achieve both long and high spans, was built over the fast-flowing, dangerous waters of which?