As you travel the English canal system there are bridges everywhere. Rail bridges, cobbled bridges, footbridges, motorway bridges, winding bridges that allowed horse drawn narrowboats to swap towpath sides without unhitching, viaducts, aqueducts over canals, roads and rivers and on the Bridgewater even a swing aqueduct over a ship canal. And when you see the bridges there are suddenly two as they stand on their watery heads (Norman MacCaig).
These were taken on the Birmingham Canal Navigations one wintery Spring long ago:
And if you ever fly over Spaghetti Junction in Bimingham and wonder what might be going on below – here you are:
northumbrian : light 
I particularly like the first photo. Thanks.
Thanks – the lost joys of the 2.25″ negative.
Especially love that middle shot!
Thanks Tina – I had to run up from the towpath carrying a Mamiyaflex TLR to capture the boat before my friend ‘sailed’ off into the distance – I was fitter then 🙂