Hi GranadaGaby! NICE SPAIN PHOTOS you have on your photos page!! (see GranadaGaby's profile) YOU (and Emma) WERE AT THE LAST "Party With MadridMan" in April!! Have you seen the photos of you yet that were taken there?
Are you asking about travel in Europe or only within Spain? If within Spain, probably taking the standard buses would be cheapest. A lot has been said about the pros/cons of bus/train/plane travel within Spain in this forum.
Have a wonderful time while in Spain and yes, take every advantage to see as much as possible. You'll be glad you did later on.
Saludos, MadridMan
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