Started in 1883 and completed in 1890 this 2.5 km long bridge was the first complete steel railway bridge in the world. I passed it on holiday in 2010 when they where in a process of refurbishing the whole structure . This proces started in 1998 and was done in 2009 taking longer then building it.
But without the cost of 57 lives during building it. More about the bridge you can read here.
I dedicate this post to sunday bridges.