I have heard great things about Santorini from my esthician who is greek.
Sumorani that was quite helpful about barcelona... i've already been to paris but i am excited to explore barcelona. Is the subway easy to use?
I didn't use the subway. We were there for four days and traveled everywhere by cab. The first day we got there and checked into our hotel, went to a cafe and the first thing the waiter said was, when you go in the subway make sure you hold on to your bags tightly because people here snatch your things and run away. So we were like, why would we risk that? So just decided to use cabs. You should consider it too specially when you're in another country, don't know your way around and rarely do you find anyone that speaks english even when you're in cabs sometimes it will be difficult to communicate but I can speak spanish somewhat so it was a bit easier.