In April/May we will be in Portugal for a little over 3.5 weeks. We are spending our time in the Lisbon and Porto areas and cities in between. I'm planning on obtaining tickets in advance for Pena and Regaleria in Sintra, the library at the university in Coimbra, the Belem tower and monastery in Belem/Lisbon. I also have plans made for the Duoro River wine area. Are there other places I should reserve in advance?
I have four full days in Lisbon. We plan to go to Cascais for one or part of a day. We will have already spent two days in Pena. I'm looking for opinions on spending time to go to the Queluz National Palace. Looks like it would take about 40 minutes and involves a train to a bus from lisbon.
Lastly, I've priced out the Lisboa card. It seems like we might break even if we buy a one day pass for the day we go to Belem. Otherwise it seems like a Viva Viagem card may be the way to go. I don't really have a sense of how much we would use the local transportation--trolleys and metros. I'm curious if this has been the reaction of others.