🚲 Harecastle Tunnel is a canal tunnel on the Trent and Mersey Canal in Staffordshire between Kidsgrove and Tunstall. The tunnel, which is 1.5 mi (2.4 km) long, was once one of the longest in the country. Its industrial purpose was for the transportation of coal to the kilns in the Staffordshire Potteries. The canal runs under 195 m (640 ft) Harecastle Hill near Goldenhill, the highest district in Stoke-on-Trent. Although described singularly as a tunnel, Harecastle is actually two separate but parallel tunnels built almost 50 years apart. The first was constructed by James Brindley in the late 18th century and the second larger tunnel was designed by Thomas Telford, and opened in the late 1820s.