If you want to learn about Portuguese wines and ports, the Wine Bar do Castelo is the place to visit. The owner has a wealth of knowledge about wines, along with what should be served with each type. Be open to experimenting with the different wines and tastes. You'll learn a lot about wine and your personal tastes.
The staff is friendly and extremely attentive. They even helped us in locating a bag left at our hotel.
The Wine Bar do Castelo is not easy to find and seating is limited. If you have a reservation, you have their full attention. Without a reservation, you probably won't get in. It fills up every night for a reason. It was one of our favorite outings in Lisbon.