1:杭州湾跨海大桥(中国) :世界最长跨海桥。


Across the Hangzhou Bay extends the longest trans-oceanic bridge in the world, with 35,673 kilometres (22 mi) long with six expressway lanes in two directions. The bridge was built to address traffic congestion in the booming region, cutting the driving time between Shanghai and Ningbo from four to two-and-a-half hours.
The bridge underwent various feasibility studies for a decade before it was approved in 2003, and finally opened to the public on May 1, 2008. Total investment on the bridge was RMB 11.8 billion (around US$ 1.4 billion).
2:Wind and Rain Bridge (China): Dong people's bridge

3:Ponte Vecchio (Italy): Oldest and Most Famous of its kind

The Ponte Vecchio in Florence is one of the most famous tourist spots in Italy, and is thought to be the oldest wholly-stone built, segmental arch bridge in Europe, although there are many partial segments which date further back. It was originally built of wood until destroyed by floods in 1333, and twelve years later it was rebuilt using stone. Famous for its lining of shops, the bridge has housed everybody from Medieval merchants and butchers to souvenir stalls and art dealers.