San Francisco, California - the Golden Gate Bridge

Plaque reads:

To span the Gate, Chief Engineer Joseph Strauss had to contend with wind, fox, ocean waves and tidal currents, and a 19th century fort located where the south end of the bridge should be.

Construction began January 5, 1933. Strauss spared Fort Point by placing the South Pier 1,125 feet from shore in 65 feet of water.

Golden Gate Bridge opened to traffic on May 28, 1937, but the work is never finished. To prevent corrosion, the steel has been painted continuously since opening day with the reddish hue known as International Orange.

Length of main span: 4,200 ft.
Length of suspension bridge (including anchorages): 6,450 ft.
Total length of bridge and approaches: 8,981 ft.
Height of towers above water: 746 ft.
Depth of tower piers below water: 110 ft.
Number of main cables: 2
Diameter of main cables: 36 3/8 inches
Number of wires in each cable: 27,572
Total length of cable wire: 80,000 miles
Weight of cable, wire and fittings: 24,500 tons
Total estimated weight of superstructure: 83,000 tons
Maximum height (under bridge to water): 220 ft.
Roadway width: 60 ft.
Traffic lanes: 6
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On its broad decks in rightful pride,
The world in swift parade shall ride,
Throughout all time to be;
Beneath, fleet ships from every port,
Vast landlocked bay, historic fort,
And dwarfing all - the sea.

From The Mighty Task is Done, a poem written by Chief Engineer Strauss upon completion of the bridge in 1937.