수성동계곡
Su Seongdong Valley is a valley that flows down from Inwangsan Mountain and joins Cheonggyecheon Stream. It is said that the neighborhood was called Su Seongdong (水聲洞) during the Joseon Dynasty because the sound of the water in the valley was loud and clear.
由近到遠 · 距離為直線距離，實際步行會更遠。