Check out colorful photos of Cheonggyecheon in South Korea

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.