It is a new country for me and it is full of new places to travel. Luckily we have one friend at the apartment who knows the area pretty well. So we did not have much trouble in locating the places to visit but if you travel by public transport following information would be useful for you.

  If you are near IST you need to travel from Alameda Metro station to Cais do Sodré station which is at the end of Green line. Then you need to get the Train from Cais do Sodré station to Cascais. To travel up to Cascais you can obtain a travel card from Metro station which covers all 4 forms of transportation including Bus, Metro, Train and Ferry. You have different options but it is better to buy  a viva via gem card if you are a non frequent traveller. It is reusable and reloadable card.