Blisworth Tunnel sections lined with pre-cast concrete rings. It was also used to test out the materials that were later used on the Channel Tunnel. An unused ring is on display near the south portal. Blisworth Tunnel Blisworth Tunnel is a canal tunnel on the Grand Union Canal in Northamptonshire, England, between the villages of Stoke Bruerne at the southern end and Blisworth at the northern end. The northern end is about from the northern end of the Grand Junction Canal at Braunston, Northamptonshire and the southern end about . At 3,076 yards (2,813m) long it is the third-longest navigable canal tunnel
English Canal English Canal The English Canal () was a planned and partially completed canal project that would connect the Swedish iron ore fields around Kiruna and Gällivare with Luleå and the Gulf of Bothnia. The ore fields were discovered as early as in the 1650s, but due to their remote location in the sparsely populated areas in northern Sweden, far from both the Atlantic coast and the coast of the Bothnian Gulf, it was very hard to transport the ore to any port from where it could be shipped to its ultimate destination. All attempts during the centuries to efficiently transport