The view out over the little beach in front of Porto's Castelo do Queijo. Yes, that name does translate to "cheese castle"! It's actual name is Forte de São Francisco Xavier with the nickname coming from the rocky, wedge-shaped headland it sits on.
Beyond the little turret is the Praia Castelo do Queijo, a sandy little patch which can offer an escape from the summer crowds that flock to Matosinhos beach on the other side of the castle.