I'd never seen a bridge quite like this - a key-operated swing bridge over the Grand Union canal. It's so low over the water that the bridge needs to swing round on a sort of turntable to let the barges through. Take a look ...
If you are trying to work out where this is - well, just by the Three Horseshoes pub at Bourne End in Hertfordshire. This is where the rail mainline, the canal and the Bulbourne river run side-by-side.
Andrew Whitehead's blog
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