What is the cheapest way for a student travel from city to city in Portugal?

Lets say you are at your Erasmus accommodation in Porto, and you are thinking that the next weekend you have no parties planned and nothing special to do… The idea of travel and get to know different city in Portugal in that weekend suddenly pops-up in your head, so you start searching the cheapest way… Continue reading What is the cheapest way for a student travel from city to city in Portugal?