Travel tip: If you get a chance, after checking out the obligatory (and amazing) Gaudi stuff around Barcelona, take a train to Montserrat, a fantastic place to relax, enjoy the museum, and hike around the strange rocks. I stayed there overnight once and it was very reasonably priced for an unimpressive but decent room. You need to allot at least one full day for the travel and exploration. It's a monastery, but I enjoyed it enough to make two trips there despite my devout atheism. You have two choices for how to get to the top, a scary cable car or more comfortable train. I'm somewhat afraid of heights, so I kept the cable car for my second visit; it was great fun. (See Wikipedia for pictures and more info.)