Following the traffic difficulties we experienced entering the heart of Paris, we had told google maps to lead us to a suburb a little out of Barcelona. Unfortunately it wasn't far enough, so once again we found ourselves lost in the streets of a large foreign city. Being unable to enter a new destination into google (and the newly bought GPS still unrouteable) our only option was to retrace our steps out of Barcelona. Once we were in a less chaotic  area we found a MacDonalds whose wifi we could use to search for a campsite that we could base ourselves until we got our bearings.