Considering the Margarida da Praca in Porto?
A VT member wrote the following comment about visiting Porto:
Metro to and from Airport by seoulgirl
I"m writing this so you don't have to make the mistakes we did. Metro wasn't that hard but there are things you should know. There is a sign at the airport that points to the metro. YOu go down the escalator and there is no sign that points to the metro. You end up in the parking lot. We went back up and walked farther thru the airport. There we went down the esc. again and there it was. If you take the end esc. then you have to walk thru the parking lot and the metro is inside the glass. It just is not marked very well. It's 1.60 to the city center and is a Z4, 4 zones. The machine can be changed to English. It takes bills but I did not see another machine that took the bills, only coins. GET COINs before taking the metro just in case. The subway comes very regularly and is new and is very nice. Wonderful system. YOu also have to validate the ticket in the little yellow boxes before you leave.