Thing is, we only have a one day sojourn up from Lisbon to Porto. We'll be in route for 2 nights there. This is our first visit to Portugal, and clearly there are so many place to see (and eat), but our time is limited.
That being the case, if you were headed to Porto from Lisbon with the intension of arriving by early evening --- what 2 sights and cities would you recommend with the time we have available?
FYI: This is a last 10 days of December adventure. I suppose that might have a bearing on where we stop and for how long (?)