Visiting the north of Switzerland

I visited a friend in Switzerland and stayed with some friends at his place in Basel for a couple of days. We all went there to celebrate his birthday and it was really nice to see all the people, because some life in different cities and I have not seen them for a long time. From Basel we did a hiking trip to the surrounding nature, where we also climbed some rocks and camped there. I arrived in Basel at the Basel Badischer Bahnhof via train, because this train station is still considered to be on German territory and therefore the train tickets are cheaper than going to Basel main station. From there I walked to my friend's place, which was only half an hour and close to the river. Basel is directly at the border with Germany, but also France is very close and so three languages mix in Basel (Swiss German, German and French).