Our recent holiday took us to the city of Porto for the first time. We rather liked it. Only a limited amount of time for port tasting with a small boy in tow, but we did manage to wander around and take lots of photos. In particular I was rather taken with the tiles and the street art (and the street art involving tiles!).
The QR code above takes you to this website (featuring lots of tile related graffiti - in Portugese).