Finally reserved hotels and got our itinerary in place. Feedback is highly welcomed and I really want to know what places/experiences are absolutely do not miss? (we love the outdoors, history, walking, are nonalcoholics, don't care for the cathedrals).
Lisbon, 4 full days, 4 nights
Sintra, 1 full day and night
Porto (by train, seems like we come back to Lisbon for this) 4 days, 4 nights
Fly to Barcelona for 5 days
Fly back to Lisbon before we fly back to States
Day trip recommendations? Tour recommendations? I kept going back and forth on Sintra (whether to do as drip trip or to sleep overnight and decided just to go ahead and sleep).