The Duoro Valley is definitely worth the day trip required to visit. Paulo picked us up from our Gaia hotel and we went directly to our first Sandeman tasting. Our early arrival although we drove at 80-100kmh the whole way allowed us to beat the crowd and do the premier 10,20,30, 40 year tasting After a cozy lunch we visited Dow before returning to the hotel at a similar speed. It was a great day in Duoro Valley.