Barcelona is an incredible city where, in seven weeks, I never ran out of things to do and was always so pleasantly surprised at how genuinely nice the people were.

I had an incredible experience in Barcelona.
Every day I went to my internship for around 4 hours and, after getting lunch, would spend the rest of the day exploring the city. I highly suggest buying a guide book prior to arriving in Barcelona. This was a GREAT help to me as it suggested particular restaurants and various activities around the city.
CIS also offered a handful of walking tours around the city. I suggest taking advantage of these as it gave me a better idea of the layout of the city. I do wish that these tours had been given at the beginning of my time in Barcelona because I think it would have helped orient me to the city.
Some of the best things I did in Barcelona I found randomly. For example, I really enjoyed watching castell (human tower) competitions. I would definitely suggest to anyone going to Barcelona to explore and branch out from the touristy areas.