picture
to
advance
or
Standedge Tunnels. Engineering masterpieces, with the railway tunnel and canal tunnel (entrance not visible, but roughly behind where the train is) under the Pennines, with the River Colne diverted to go over the top. The canal tunnel is the longest and highest in Britain. There are actually two further, earlier, railway tunnels, now disused, to the left of the current one. All four tunnels are linked by cross passages, which allowed the rail tunnels to be constructed more quickly by removing the waste via the canal. The canal basin, behind the trees in the right, has featured in several episodes, but was not accessible due to the excessively wet conditions!
