. . . "Caldon Canal"@en . . . "21.9456"^^ . "2.1336"^^ . . "The Caldon Canal (or more properly, the Caldon Branch of the Trent & Mersey Canal), opened in 1779, runs 18 miles from Etruria, in Stoke-on-Trent where it leaves the Trent and Mersey Canal at the summit level, to Froghall, Staffordshire. The canal has 17 locks and the 69-metre long Froghall Tunnel."@en . . .