@Cobi in honor of this years TISC i went for a full spanish trip this past two weeks, crossing all 15 regions (excluding the islands of course)
This was my journey, all by train (and bus sometimes), from and back to Amsterdam
The contrast between regions (landscape, house architecture, spanish accents or actually different languages) is incredible in Spain. I loved all regions but i must say i have a special place in my heart for Extremadura, Aragon, Euskadi and Galicia.
And a very interesting fun fact to whoever wants to visit Spain outside the typical Madrid+Barcelona trip: every single province capital of spain (except one) is directly connected by train to Madrid!