William Jessop and Thomas Telford, the greatest of which was the crossing of the Dee valley. With its nineteen spans and height of 38.4 metres, Pontcysyllte Aqueduct was the tallest aqueduct in ...

Situated in north-eastern Wales, the 18 kilometre long Pontcysyllte ... The aqueduct is a pioneering masterpiece of engineering and monumental metal architecture, conceived by the celebrated civil ...

Constructed in the 1870s to house workers from the Llangollen ... the cottage once witnessed the world's tallest aqueduct until Thomas Telford's Pontcysyllte surpassed it four years later.

The UK is home to 31 of them (35 including overseas territories) with two - Ironbridge Gorge and Pontcysyllte Aqueduct - here on home turf. And marking World Heritage Day on April 18, travel ...