Kalstad is a very beautiful town in central Sweden, passing through a transit station on the way to Oslo. The small town has a small population, but it has Ericsson and the research institute of the national telecommunications company TELIA, so it is one of the information technology centers in Sweden. The tour guide specially took us to visit a complete medieval bridge. The scenery is very beautiful. In such a beautiful town, the guests and tour guide actually quarreled and were drunk.