Pontcysyllte Aqueduct

About

The Pontcysyllte Aqueduct is a stunning feat of civil engineering that carries the Llangollen Canal across the River Dee in the heart of the Vale of Llangollen, Wales. Completed in 1805 after a decade of construction, the 307‑metre, 39‑metre high stone and cast‑iron structure remains the longest aqueduct in Great Britain and the highest canal aqueduct in the world. Its 19 arches are arranged in a graceful line that runs above the river, allowing pedestrians to walk along the towpath and enjoy sweeping views of the surrounding landscape. Recognised as a UNESCO World Heritage Site, the aqueduct showcases the ingenuity of Thomas Telford and his contemporaries, providing visitors with an unforgettable blend of history, architecture and natural beauty. A walk across the aqueduct offers a unique perspective of the engineered waterway, while the adjacent visitor centre offers contextual information and a small café for refreshments. The aqueduct is open to the public daily and can be accessed free of charge, making it a perfect add‑on to any trip to North Wales. While plenty of maintenance may result in brief closures, the structure remains largely unchanged and continues to be a major draw for engineers, historians and tourists alike.

Highlights

• Longest Aqueduct in Great Britain
• Highest Canal Aqueduct in the World
• UNESCO World Heritage Site
• 19-Arch Stone and Cast‑Iron Design
• Magnificent 19-Span Trough

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At a glance

• Typical visit: about 2 hours