On the second day we headed out to Foz do Douro and Matosinhos, small seaside towns just north of Porto.  It’s possible to walk there from the Porto city center by following the paved walkway that winds along the coastline, however it will take about 1-2 hours. On a nice day, you will find a lot of people out on the beach.  The aesthetic and layout of this place reminded me of the beaches of Rio de Janeiro, which is not surprising since Brazil was settled by the Portuguese.