The Coathanger, Sydney

The Sydney Harbour Bridge is a steel arch bridge across Sydney Harbour that carries rail, vehicular and pedestrian traffic between the Sydney central business district and the North Shore. 

The bridge is locally nicknamed The Coathanger.

With a main span length of 503 meter (1,650 ft), the bridge was designed and built to be the largest spanning-arch bridge in the world.  A few months before the bridge was opened in 1932 however, in New York the Bayonne Bridge, with a main span lenght of 504 meter (1,654 ft) was openend. So, Sydney Harbour Bridge never was the largest spanning-arch bridge. Today, it's only the fourth-longest spanning-arch bridge in the world.

The length of the main span is the most common way to rank arch bridges. If one bridge has a longer span than another it does not necessary mean that the bridge is longer from shore to shore or from anchorage to anchorage.

According to the Guiness World Records , Sydney Harbour Bridge is the world's widest long-span bridge and the  tallest steel arch bridge, measuring 134 metres (429.6 ft) from top to water level.

Biggest, tallest, greatest ... I really don't care. It sure is impressive