On my second Camino but first in Portugal, I intend to start from Porto and probably fly in to Lisbon. Between there and Porto, Tomar and Coimbra sound like interesting towns it might be good to see. If you've passed through them, I'd appreciate knowing whether they have unique or compelling sights enough to go out of my way to see them by bus or train, or just go on to Porto and spend a little post-Camino time back in Porto and Lisbon. While Santiago was wonderful, I don't plan to spend much time there this trip. As with the Camino Frances, walking it is straightforward; it's harder to know how to handle my two weeks or ten days before and after the walking stops.