The railway crosses the canal here over the striking skew arch and cast iron bowstring bridge set between four semi-octagonal stone turreted towers and then onto the 17-span Gauxholme Viaduct. When built in 1840 it represented a considerable feat of engineering and was one of the first two bow string bridges in the country, the other was down the line at Whiteley Arches near Hebden Bridge.
Once you've listened to the commentary continue with your journey.
Retrace your steps back along the towpath to Wadsworth Mill Lock 20, cross the canal and follow the footpath. On the way look out for the Waymark "chair" with a carving of the Skew Bridge on its back. Also look out for the base of a gantry support (explained in the next track). The footpath leads to Dobroyd Road and a railway crossing. Stop at the crossing.
Here is a good place to listen to the next track.