During fall break, I went to Philadelphia. Southwest part of Schuylkill River, where it meets with the Delaware River, runs through the city. Known this, I spent some time walking on the Schuylkill River Trail at night. The trail near the river creates a recreation area for citizens that separates them from the hustle and bustle of ordinary life. Everyone has a way to enjoy what the river has offered. Wandering along with the trial, I saw some people running with the flow of the river; some lay on the grassy bank; others walked their dogs in a park next to the trial. A speeding train flew past by, only left a blurred outline in the picture above. However, the water stays tranquil no matter at what time in a day, bringing a sense of peace to people walking by. It is harmonic that the natural river and human trace in the metropolis complement each other.