Apparently there are many different maps for this game in circulation, but it being notoriously difficult to get hold of them nowadays (the game has been out of print for some time), I have decided to do my own, starting with the Iberian Peninsula:

If you're at all familiar with this part of the world, on closer inspection you may wonder what happened to places of note like Vitoria or Santiago de Compostela, to name but two. Well, the game does impose a strict limit on the number of cities (36 minus one for each capital with double numbers - Barcelona, Madrid and Lisboa in this case), so some tough decision-making was inevitable. In gaming terms, an excessive accumulation of cities in one corner of the board is undesirable (as it unbalances gameplay); that is why Vitoria went out (it is just too close to three other cities: Bilbao, San Sebastián and Pamplona). On the other hand, minor cities like Albacete or Teruel, which lie in the middle of nowhere, where included for that very reason. And what is it that La Coruña and Vigo have but their neighbour Santiago de Compostela lacks? You work it out (tip: it has something to do with football and the Spanish First Division).
Click on the map pieces to enlarge and download from there:
Print each piece on an A4-landscape sheet,
then join them in any convenient manner (some bits of sticky tape on the
back will do nicely).
For playing, unless you want to draw directly
onto the paper and print out a new board each time you play, the idea is
of course to cover it with plexiglass ("Perspex") or some other rigid transparent
material, which is ideal for drawing your railwaylines upon with a non-permanent
felt-tip pen, and a cinch to clean afterwards.