Just a note to say that while preparing a recent trip to Cantabria/Asturias, I found a great website for rural hotels, hostals, etc., for anywhere in Spain and beyond (I believe). Generally includes picture, price, etc., and allows the user to narrow the search to, for example, whether pets are allowed, can accommodate disabled, etc. See www.toprural.com A good site.

Great link! Have you personally used their "properties"??

Here's another for Rural Houses: http://www.casasrurales.com/