We only had a few days in Lisbon and Portugal Trails organised a 4 hour walking tour and a guide for us called Patricia. We didn't want to shop although she would have helped us with that. We wanted to see a lot and have information about Lisbon, the people and the history. She was exceptional, pointed out tricks pickpockets use on the trams like asking you to open the window, showed us how to use the Metro and gave us local information that isn't in the guide books. We covered a large area and it was much better than wandering around not understanding what we were seeing.