In this video we visit the Pontcysyllte aqueduct in Wales. Near to the town of Wrexham. This UNESCO world heritage site is a masterpiece of Georgian canal engineering. Designed by Thomas Telford and built between 1795 and 1805. The aqueduct has been drained for maintenance a one in 10 or 20 year event. The aqueduct was actually built by a team of master engineers during the canal building frenzy during the late Georgian period in Britain. Thomas Telford amongst others were responsible for this cast iron giant that spans the River Dee. This video is a historic canal documentary that looks at the construction of the Pontcysyllte aqueduct and makes use of that fact that the aqueduct is drained and we can look in detail at its construction and how Telford and the canal engineers at the time put it together like a large meccano set. Canal history documentary.