A view from 1998 of a canal boat crossing the famous Pontcysyllte Aqueduct on the border between England and Wales. Completed in 1805, it is 1,007 ft (307 m) long, 11 ft (3.4 m) wide and 5.25 ft (1.60 m) deep. It consists of a cast iron trough supported 126 ft (38 m) above the river on iron arched ribs carried on nineteen hollow masonry piers (pillars). The iron trough was mortared with lime, water, and ox blood. Crossing it, the skipper has a view way down and it feels very weird.