Awarded World Heritage Status in 2009, The Pontcysyllte Aqueduct was opened on November 26th 1805 at a cost of £45,000 and remains open for full use today. At 116 feet high it was the worlds tallest aqueduct for 200 years, taking The Llangollen Canal over the River Dee below.The bridge section, constructed solely from iron is 11 feet wide, 5.25 feet deep and 1007 feet long. The joints are sealed with welsh flannel, dipped in boiling sugar and sealed with lead. They remain today untouched and waterproof! As can be seen, there is a low fence on the towpath side, but nothing on the offside to protect the unwary boater from falling to the river below. We crossed this structure in August 2009.