バルセロナ … I do recommend staying in the Gothic because it’s really the heart of what’s happening in the city. Just be aware, and stay clear of the following places -- La Rambla, (also known as La Rob-la), the Metro (one of the places I’ve seen the most robberies, averaging one sighting a week), and Calle Ferran (filled with drunk tourists).
Please watch your bags and personal belongings. We were warned but my friend set her bag down at an internet cafe, right next to her foot, and it was stolen within a couple minutes. I've heard dozens of theft stories from other バルセロナ visitors. Please never put your things down and be aware! Have fun... oh yeah, and Dino's Gelato is amazing!
While you're in バルセロナ in the evening, grab some new friends from the hostel and go check out the "Magic Fountains" nighttime fountains/lights show (ask your hostel front desk person for directions).
バルセロナ is beautiful city! If you are thinking about Barcelona -- do not think, just go!
I would not go back to バルセロナ. The whole city seems to have a sewerage smell about it which is very unpleasant. The back streets also don't feel very safe. It seems like a fairly poor city. It also takes a lot of walking around to get from one sight to another. Having said all that, the old palace (now an art gallery) is utterly magnificent and provides a commanding view of the city. Gaudi's cathedral is also an impressive spectacle of engineering. Some of the more busy streets become beautiful and very pleasant at night, but plain by day. The city is worth stopping by if you're in or near the region but I wouldn't plan a holiday specially to Barcelona.
It's an amazing city, one of the most interesting I've ever been to. It's not nearly as bad as people say -- especially La Rambla. Our apartment was on a side street right off La Rambla and we had no problems at all. Of course if you go there looking for a nice, peaceful evening, that's not gonna happen, and I wouldn't wander the side streets alone late at night, but all in all I didn't feel in danger at any point. バルセロナ reminded me a lot of Rome -- there's just too much to see in a short time span, and it gives the appearance of being dangerous when it really isn't. I'll be going back.