Cheonggyecheon
stream in Seoul, South Korea

Cheonggyecheon (Korean: 청계천; Korean pronunciation: [t͡ɕʰʌŋ.ɡje.t͡ɕʰʌn]) is a 10.9-kilometre-long (6.8 mi) stream and public space in downtown Seoul, South Korea. A natural stream sourced from the Suseongdong Valley in Inwangsan, it was historically maintained as part of Seoul's early sewerage until the mid-20th century, when post-Korean War rapid economic development and deteriorating conditions prompted the filling of the stream with concrete and the construction of an elevated freeway, the Cheonggye Expressway, in its place. In 2003, the city government began an urban renewal project to remove the expressway and restore the stream, which was completed in 2005 at a cost of over ₩386 billion (approximately US$281 million).
The Cheonggyecheon restoration project initially attracted significant public criticism, but since its opening in 2005 it has become popular among residents and tourists.
Geography
Cheonggyecheon is an 10.84 km (6.74 mi) stream flowing west to east through downtown Seoul, and then meeting Jungnangcheon, which connects to the Han River and empties into the Yellow Sea.
History
The stream was named as Gaecheon ("open stream") after the first refurbishment project to construct a drainage system during the Joseon period. The work, which included dredging and bolstering the banks of the stream and building bridges, was carried out every 2–3 years during this period from the reign of Taejong, the third king of Joseon. King Yeongjo especially undertook the refurbishment work as a national project.
Gaecheon was renamed to Cheonggyecheon, its current name, when Korea was under Japanese rule. During this time, financial difficulties disrupted and prevented Japanese forces from covering up the stream despite several attempts to do so.
The public source identifies “Cheonggyecheon” as stream in Seoul, South Korea. This brief keeps that definition visible, then builds a research path around Cheonggyecheon, stream and Seoul.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 13, 2026. The linked authority identifier is Q495437. The Library of Congress control number is sh2003000063. Authority coordinates are 37.569, 126.978. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2003 and 2005.
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This entry incorporates text from “Cheonggyecheon” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.