Huge chestnut trees line the sentry walk. At the bottom of the valley, the Vesdre winds its way through Dolhain, bypassing the old town.On the road from Eupen to Verviers, you can see the 268-metre railway viaduct, built in 1842. On the other side of the valley, you can see the bell towers of Bilstain and Andrimont. Further on, towards the horizon, the Herve plateau stretches out. You can make out the site of the road linking Liège to Aachen.► At the top of the path, turn left and walk past the casemates (former 17th-century prisons) before returning to the wonderful Place Saint-Georges, covered in Vesdre pebbles.