Greatham Old Bridge, West Sussex.
Greatham Bridge was built for Sir Henry Tregoz in the late 13th century. The iron section was built after floods had damaged the bridge in 1838. A skirmish took place near the bridge during the English Civil War.
Another remote location this is easy to find due to it still being used as a crossing of the river Arun. There are a few places that you can pull into to park along the road.