After Welsh Frankton, the bridge numbers revert to 1.
At Chirk the canal turns sharply across the Afon Ceiriog onto Chirk Aqueduct which is paralleled by the later railway viaduct.
Immediately the canal plunges into Chirk Tunnel - this view is taken from above the tunnel mouth.
The tunnel itself is only wide enough for one boat to pass through in one direction at a time and has no towpath - not a problen now but in the days of horse-drawn boats, the horses were walked over the top and the boats "legged" through.
Further up the canal the Pontcysyllte Aqueduct which carries the canal over the River Dee Valley 122 feet in the air is seen.