While the Siduhe Bridge is the highest bridge in the world and the Millau Viaduct is the tallest bridge in the world, this bridge is the longest bridge in the world. It is a jaw dropping 102 miles in length and recognized by the Guinness Book of World Records. The rail bridge forms parts of the Beijing Shanghai High Speed Railway and as the name suggests it helps link Danyang to Kunshan. Construction started in 2006, took 4 grueling years to be completed and then opened in 2011. The huge project cost an unbelievable 8.5 billion dollars and employed roughly 10,000 workers on site. Over 450,000 tons of steel was used for the structure. This beast of a bridge will probably cement itself in history for a long time.