The water canal rises and falls like dancing blue hills, some fish inhabit these streams in the daytime, by twilight the water becomes as if someone filled it with an assortment of wet paint. At midnight the water currents rapidly decrease in speed, with a dense misty fog to make matters worse. The water absorbs chakra quickly so anyone below Jounin, or aren't atleast a jinchuriki of Chunin levels couldn't run across it. Battling on these waters also wouldn't last long in some cases it would be suicidal to do so. Ninja sometime strike when its pitch black at night. Your lucky to have a courier to guide you along these parts, incase of an attack stay on the boat; defend the courier, the boat and yourself to evade grave danger. This boat could lead you Sora's hidden entrance "Uptown" and various other paths outside the village if you got the cash and skills to go there.