The Sydney Harbour Bridge has earned the "coathanger" nickname thanks to its arched shape. This affectionate local nickname belies the scale of the bridge, which is one of the world's largest steel arch bridges.
Built in the mid-1920s and early 1930s, the Sydney Harbour Bridge has an arch that is about 140 yards above sea level at its highest point. The arch, which tapers toward the top, does in many ways resemble the design of a curved coathanger, though, of course, the bridge is a considerably more complex feat of engineering than a simple coathanger. It's also much bigger, with the arch alone weighing it at 39,000 tons.