Down from the Katrina elevator, across the bridge into the old city of Sishi. The history of the old city can be traced back to the 13th century. It has a history of more than 700 years. Since there has been no war in Sweden for 200 years, the old city is well preserved. It is full of ancient buildings, medieval alleys, cobblestone streets, colorful Germanic buildings, which are worth taking time to visit and savor slowly. Many scenic spots are interspersed in the old city, palaces, churches, Nobel Museum and so on. Walking in this quiet heart is like traversing the tunnel of time and returning to the old times of medieval Europe. It is a pleasure to shuttle between narrow alleys and wide streets in old urban areas. There are many cafes and restaurants on the street. There are various kinds of tea, and there are many kinds of Western dishes. You might as well sit down and have a drink, experience the local street flavor, and integrate into the local people. It is not another experience in tourism. Around the streets and alleys of the old city, I stayed here for a long time unconsciously and walked out to see the ferry terminal very soon. It suddenly occurred to me that I would not like to take a ferry trip to Lake Meraren and enjoy the scenery of both sides of Stockholm in a different way.