I will be in Lisbon for 4 days and Sintra for 2 days before going on to Porto.
I will be traveling around Portugal by train and metro and visiting all the sites. I have already purchased my train tickets From Lisbon to Porto and return
Do you have an easy to understand explanation of the VivaViagem card. I understand the general concept of the card but am confused about zapping. I f you do not use all the credit on the card in a certain time frame it expires or is carried over. The more I read the more confused I get. I have purchased cards in other countries and they seem more user friendly.