10 Things to do in Barcelona in 2 days!

Hello all.

I'm an American living in Beirut. We are so exciting going to Barcelona me & my friend. We are spending the weekend in this lovely city next month by the end of the year. We never been there before and I would like to spend these days wisely and visit the most important attractions. Also I'd like to know how easy and safe is the use of public transportation, we don't have a big budget.

Any suggestions?

If you tell me when you are coming over, I can try to show you Barcelona for free, depending on schedules, and my work. Eventually I can give you a piece of advice depending of your interests, e.g. museums, architecture, parks, etc... once you are here or in advance by mail.