Assuming our flights go as planned, a group of 6 of us will be in Lisbon a few days after Christmas. Since it is not just my wife and I, we won't be using this time for scouting, just holiday time with my family.
We plan on visiting Sintra for one day, Porto for one day and maybe a Lisbon food tour. The rest is open for leisure and visiting around Lisbon. Are there any recommended experiences specifically for this time of year? FYI we'll be in Alfama