Pretty simple... we are visiting Lisbon specifically but want to extend our trip... too far to go to just visit Lisbon, I think... so where should we go if we want to stay 4 to 5 more days? Should we drive and see place near Lisbon, train or rent a car? Then circle back to Lisbon to return to the US? Or should heads towards another major city and return to the US from there? I am thankful for your responses.