1. Gaudi Gaudi Gaudi. Please see all the Gaudi. My list would be:
Sagrada Familia
Park Guell
Casa Mila and Casa Batlló 2. Walk around Old Town. 3. Museo Picasso 4. Chupitos Barcelona, it's a Barcelona Shot Bar on Fire.
http://funkrocks.com/2008/10/12/espit-chupito-barcelona-shot... 5. If you are into modern architecture, Mies van der Rohe's Barcelona's Pavillion. If you have extra time:
Dali Museum in Figueras. It is probably one of my favorite museums.
There is a house (can't remember who's) in the middle of Park Guell where they have examples of things not normally associated with him (furniture, drawings etc). I remember a spiral stairway inside leading up to bedrooms (with some amazing bedframes) and on the left is a case with sketches and drawings. There was one that I found amazing/haunting. If I ever return I'll take a photo. Can't locate it anywhere :(