Cheonggyecheon (Korean: 청계천) is not just a stream, but the true green heart of modern Seoul, the bustling capital of South Korea. Once hidden under a layer of asphalt and concrete, today it is a stunning public space for relaxation and walking that snakes for 11 kilometers through the central part of this dynamic metropolis. It is a striking example of how a city can harmoniously integrate nature into the urban landscape.

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This unique linear park, whose open section measures 8.4 kilometers, quickly became one of the city's main and most beloved landmarks. After an impressive reconstruction completed in 2005, Cheonggyecheon was transformed into a picturesque oasis with pedestrian paths, bridges, and small waterfalls, literally breathing new life into the surrounding areas and fundamentally changing the face of Seoul. It is extremely popular with both locals seeking a corner of tranquility amidst the city bustle and tourists wanting to see the modern side of the Korean capital.
The Cheonggyecheon Stream flows through central Seoul from west to east, creating a pleasant contrast with the high-rise buildings surrounding it. Its waters flow slowly to join the small Jungnangcheon River. Jungnangcheon, in turn, is a tributary of the larger Han River, which carries its waters further to the Yellow Sea, located about sixty kilometers from the city. Thus, Cheonggyecheon is not only a place for recreation but also an important part of the region's water system.