check out the alto section, avoid the center even though its really nice. There is also a restaurant in the old castle that overlooks the city, pretty fancy but the view is worth it. If you like to picnic there is great sausage and cheese to be had along with a bottle of vinho verde, which is a great wine to drink on a picnic because it doesnt ask very much of you. THe aged serra cheeses are great if you like the strong stuff.