sentences:  The path descends into the Lea Valley, passing under the railway lines before crossing the B653 road.The route now follows the track of a disused railway, the former Luton, Dunstable and Welwyn Junction line.After Harpenden the path leaves the railway track and heads uphill into Wheathampstead, then it goes through the village, past the church, and crosses over to the other bank of the river.