🌊 Pontcysyllte Aqueduct and Canal
18th-century engineering marvel spanning the River Dee in Wales
📋 Fast Facts
- Completed in 1805 and designed by Thomas Telford and William Jessop
- 307 metres long and 38 metres high — Britain's longest and highest navigable aqueduct
- Carries the Llangollen Canal over the River Dee valley in northeast Wales
- UNESCO World Heritage Site since 2009
The Pontcysyllte Aqueduct is one of Britain's most significant monuments to Industrial Revolution engineering. Completed in 1805, it carries the Llangollen Canal across the River Dee valley on a cast-iron trough supported by slender masonry piers. Designed by Thomas Telford in collaboration with William Jessop, the structure remains in active use today and continues to demonstrate the technical innovation and practical ingenuity of early 19th-century civil engineering ...