So, later this year, we will be doing the Douro river cruise with Lisbon and Madrid. All of our previous Tauck tours have been in a single country - Italy, France, Scotland.
For the Douro cruise, we fly into Lisbon, travel up the Douro river and at some point enter Spain, finish the tour in Spain and fly out from there.
How does this work?
I got thinking about this because of various reddit posts talking about problems going through customs in various cities.
Any insights on what I/we should prepare for?