The idiom “still water runs deep” means that it is hard to estimate the depth of still water. It is usually used to describe the attitude of modest, tolerance and enterprising. Keelung harbor serves as the spot where many rivers aggregate, it is just right to take the idiom as anticipation toward Keelung. The work will be located at the estuary of Hsu-Chuan River, which has already disappeared during Keelung’s development. The work tries to reveal history of the river. However, we can only see the old-fahsioned architecture in traditional fish market, not the river itself. Thus, “still water runs deep” also directly refers to the natural water culture that was once unseen because of the city development.