Llangollen Canal has 19 stone arches, each with a 45-foot (14 metre) span. Another aqueduct carries the canal over the River Ceiriog at Chirk, and there are tunnels nearby at Whitehouses, Chirk, and Ellesmere. The canal also forms the boundary on two sides of the Fenn's, Whixall and Bettisfield Mosses National Nature Reserve. In 2009 an eleven-mile section of the canal from Gledrid Bridge near Rhoswiel through to the Horseshoe Falls, which includes Chirk Aqueduct and Pontcysyllte Aqueduct, was declared a World Heritage site by UNESCO. The canal at Hurleston Junction rises from the Shropshire Union Canal main line, through four adjacent
Horseshoe Falls (Wales) Heritage status because of the bold civil engineering solutions needed to construct a canal with no locks through such difficult terrain. Horseshoe Falls (Wales) Horseshoe Falls (Welsh: "Rhaeadr y Bedol") () is a weir on the River Dee near Llantysilio Hall in Denbighshire, Wales, about north-west of the town of Llangollen. The distinctively shaped weir, which is long, helps create a pool of water that can enter the Llangollen Canal (via an adjacent valve house and flow meter). The canal west of Pontcysyllte Aqueduct and the construction of the weir were authorised by an Act of Parliament obtained in 1804