Cross the stream in the sky ‘Pontcysyllte’ pronounced Pont – ker – sulth – tay, is the Welsh name for ‘the bridge that connects’ UNESCO has described this world heritage site as ‘a masterpiece of creative genius’. The first 11 miles of the Llangollen Canal is an outstanding piece of industrial and engineering heritage comprising of embankments, tunnels, viaducts and aqueducts, including the stunning Pontcysyllte Aqueduct itself and 31 other listed structures. The whole length of the site has also been designated a Scheduled Ancient Monument of National Importance, and an Area of Outstanding Natural Beauty.