This is the Pontcysyllte Aqueduct (1805), a navigable aqueduct that carries the Llangollen Canal across the River Dee in the Vale of Llangollen in northeast Wales. Created at the height of Britain's canal building, it was to be a key link between Welsh coal mines, Birmingham manufactories and the seaport of Liverpool. 19 piers with the highest being 124ft and a length of 1,008ft. It is still maintained for public recreation and is an UNESCO World Heritage site.
Britain's canals while initially very profitable were overtaken by the railroads which were far more flexible as to routes and much faster. A reminder of what was high tech in the past is a lot lower now!
