At the end of the 19th century, the port city of Hamburg was ushering in its golden age. New docks and shipyards were expanding along the South Bank of the Yi Bei River. More than 20,000 workers could only use ferry to and from the south bank and the urban area of Hamburg. The bridge repair was denied. At that time, the navigation of the Yibei River needed a bridge 55 meters high. It was too expensive to repair. So, renovate the tunnel. In 1911, the 426.5-metre Yibei River Tunnel was put into operation, with two-way tunnels and sidewalks, with elevators at both ends bringing cars (and carriages) and pedestrians 24 metres underground. After the completion of the new Yibei River Tunnel in 1975, it was no longer important. Now, cars occasionally take advantage of this nearly 106-year-old river-crossing passage, with a one-way distance of 2 euros, more free pedestrians and bicycles, and how can there be so many tourists interested in it? [