The Llangollen Canal links Llangollen in North Wales via Ellesmere in Shropshire to Hurleston in Cheshire. The canal closed to navigation in 1944 but was not in-filled because it was required as a water feeder for the Shropshire Union Canal and provided drinking water to a Hurleston reservoir. The canal's notable features are the Pontcysyllte Aqueduct engineered by Thomas Telford to carry the canal over the River Dee east of Llangollen. Another aqueduct carries the canal over the River Ceiriog at Chirk, and there are tunnels at Chirk, Ellesmere, and Whitehouses. In 2005, a marina was built near Llangollen Wharf to provide casual moorings. In 2009 the section from Horseshoe Falls to the Chirk and Pontcysyllte Aqueducts, was declared a World Heritage site. These features and spectacular scenery have made the canal the most popular one for British holidaymakers.