Trevor, Wales, and Froncysyllte, Wales One of the most impressive engineering structures that I have seen in person is the Pontcysyllte Aqueduct. Designed by Thomas Telford and built over a period of ten years, the aqueduct carries canal traffic across a chasm of over 1,000 feet across the River Dee that flows 127 feet below … Continue reading Pontcysyllte Aqueduct