The Main is a tributary of the Rhine that flows into the Rhine in Mainz. Frankfurt is called "Frankfurt on the Main" (Germany has another Frankfurt), which is the proudest city on the Main, and the city is enhanced by the river. The Main River flows from the center of Frankfurt, just as the Seine flows from Paris and the Huangpu River from Shanghai. The Main River divides Frankfurt in two. The north bank is the bank district, the old town and the commercial district, and the south bank is the residential area and the museum area (the film museum, art museum, etc. along the coast, and the museum park), compared to the bustling and bustling north bank. The south bank is relatively clean, a small foreign building on the shore, some may be office, some may be private courtyard, a small building, very chic. From Rome Berg Square to the river, you can see a bridge, that is, Eiserner Steg, the bridge is hung with colorful locks, relying on people's good wishes. There is a pier on the Main River, and the cruise ship docks at the pier. Tourists can take a boat tour and watch the coastal landscape. The fare seems to be 10 euros per person. There are also some cruise restaurants that have been docked for years, selling coffee and drinks, and the main meal is also provided, and the business is good. There are benches for people to rest along the road on both sides of the river. It is a good experience to sit down and take a break when you are tired. It is occasionally a few swans swimming in the river. In short, very leisurely and comfortable, standing in the same place can feel the blend of modern financial atmosphere and ancient European style, very good.