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Although it's been a long time, the memories of walking along Cheonggyecheon with a friend, accompanied by a senior from DAU Busan was impressive. The water is very clean and there are several small rapids, with fish swimming in them. Indeed, we did not walk 11 KM, only half of it, and then visited several interesting objects such as Statue of Admiral Yi Sun-Sin, Gwanghwamun Square and others. What an unforgettable experience.