The town centre is a rambling maze of streets lined with arcaded walkways. Looking up, you'll see fragments of the painted frescoes which once decorated Treviso's houses. The town is circled by a town wall and by waterways. Treviso markets itself as a città d'acque - water is an important feature of the townscape. The river Sile runs to the south of the centre, and canals carry water around the town, lined with houses or grassy banks, weeping willows, waterwheels and little parks. The town's defensive walls, moat and imposing gateways are lovely.