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<hr>Quite often the down side to joining an escorted tour (i.e. cosmos, etc) is that you get shuffled from A to B as quickly as possible without really getting a chance to appreciate the place. Therefore the escorted tour is less appealing...<hr></blockquote>
But if you travel all of Spain and Portugal in just those few days you will have the same experience.
You should really sit down with a good guide book and think about it. Here in Galicia Spain is very different. Spain is huge, about the same land mass as California.
Just stick to a few big cities, for your first visit. It will be a lot easier to organise. For a note we spent 10 days in Barcelona and never got bored.
Good luck!
10
ribeira_sacra
Pro tip