On Saturday we went back to Szczecin to take the train to Berlin. It is really cheap to travel there in a group of 5. For a 2.5 hours ride we paid 6 euros each! I spent the evening with an old friend from Madrid and I could meet Sanja that night. We had been 3 days in Berlin, completely mathematics-free, which is something I really needed after a whole year with no holidays, apart from a few days on Christmas. I got really inspired by Berlin. Art is everywhere. History is everywhere. Cheap food is everywhere. If it wasn’t because the main language spoken there is German, I would not mind living there. One of the places that impressed me the most was Kater Holzig, an amazing club which resembles a ship.