Cheonggyecheon Canal is a canal in the ancient Joseon Dynasty over 600 years, a length of 5.84 kilometers through the heart of Seoul. But in the set. Professor. 1957-1977 has been developed at a breathtaking pace. Canals were filled in to make roads and highways. The many tall buildings Canal Jean A. Yee Chun became rotten and shallow. Sort by slums and proposed canal Cheonggyecheon restoration project. The vendors and the public against the many. It must be a joint meeting of more than 2,000 times the Arizona Canal Jean as a tourist attraction.