Photo: GetYourGuideOne of the best-known port lodges in Gaia, Calem pairs a tour of its riverside cellars and interactive museum with a tasting of its ports, and this popular option adds a live fado performance. It is an easy, atmospheric introduction to how port is made and aged. Book the fado session ahead as it sells out. Arrive a little early to wander the exhibition, and try the aged tawny to taste what the barrels do.