If you want to eat something in Vila do Conde , also go to the Tourist Information for a stamp and ask them to explain the alternative way to Arcos and São Pedro de Rates along the Aquaduct
The Aquaduct moreless is in front of you as soon as you arrive from Labruge at the bridge over the Ave river
In front of you is a convent (de Santa Clara) on a hill and the albergue Santa Clara. Directly behind the convent is the Aquaduct.
Arriving on the bridge turn right directly and follow the
Brierley route as mentioned above by @ Martin 888 but… directly after you veered to the right you can turn to the right again and you go UNDERNEATH the bridge and here continues the COASTAL route into the center of Vila de Conde where you will find the restaurants , bars and the Tourist Information.