Pontcysyllte Aqueduct, Llangollen Canal, Wrexham County Borough, Wales, United Kingdom

The canal effectively ends after a short distance on the north side, apart from a feeder to the Horseshoe Falls on the River Dee via Llangollen. The terrain northwards appears to have been the main problem in preventing significant further extension: apart from one or more local spurs of perhaps a thousand yards serving industry south of Cefn Mawr and towards Rhosymedre other traffic was handled by the Ruabon Brook Tramway which climbed towards Acrefair and Plas Bennion, this was eventually upgraded to steam operation and extended towards Rhosllannerchrugog and Wrexham.
World Heritage Site
The aqueduct and surrounding lands were submitted to the "tentative list" of properties being considered for UNESCO World Heritage Site status in 1999. The aqueduct was suggested as a contender in 2005—its 200th anniversary year—and it was formally announced in 2006 that a larger proposal, covering a section of the canal from the aqueduct to Horseshoe Falls would be the United Kingdom's 2008 nomination.