Accent of Spaniards

In Spain is five official languages which are Spanish, Catalan/Valencian, Galician, Basque and Aranese. Still Spanish is spoken everywhere in Spain. Before going to exchange I could not hear the difference between Spanish accents but now I can hear it. In Joensuu there are Spanish students all the different parts of Spain and I have now heard Spanish with different accents. I can hear a clear difference in the Spanish of southern Spaniards but the rest of the Spaniards seem to be talking with the same accent.