Going to Barcelona and seeing its beauties can be a destination by itself. Barcelona has beautiful beaches, nice people, a tempting nightlife... If you need a guide for what to see in Barcelona and where to go, where to spend a lovely evening and where to dine, then you could try www.infobarcelona.org. You can also practise your Spanish...

But if you want to see another beautiful part of Spain, then I suggest Salamanca. I was there and it was a very pleasant time, especially because the day finishes on the streets at late hours. I saw crowded places with nice people at 3 a.m. And the best part is that Salamanca is a city full of history and young people, from all over the world.