That's a bit of a strech. You can definitely be 50km away of everything in Galicia, and probably way more in Castilla. It's true that population is more dispersed in the northwest though.
I don't say that there are thousands of people around any random point, I meant that I would be really surprised if any of the places being talked about in the article is really isolated.
It also depends on your definition of being "50km away from everything". What place are you thinking of?
