Photographing Barcelona's diverse architecture

So one of my friends borke up with his girlfriend. They already had everything booked for a trip to Barcelona, so I had to say yes, when he offered me to go with him. I grabbed my old Canon 600D and 2 lenses and off we went. Over the course of 4 days we walked about 90 kilometers, got into a lot of fancy hotels and other buildings and I took over 700 photos. Here's a collection of the best images of this trip.