Cheonggyecheon is an 8.4 km (5.2 miles) long, modern public recreation space in downtown Seoul, South Korea. The massive urban renewal project is on the site of a stream that flowed before the rapid post-war economic development required it to be covered by transportation infrastructure. The $900 million project initially attracted much public criticism but, after opening in 2005, has become popular among city residents and tourists.
Cheonggyecheon is a 5.8 km creek flowing west to east through downtown Seoul, and then meeting Jungnangcheon, which in turn connects to the Han River and empties into the Yellow Sea. During the 1948-1960 presidency of Syngman Rhee, Cheonggyecheon was covered with concrete for roads. In 1968, during the presidency of Park Chung-hee, an elevated highway was built over it.