In 2003, the city of Seoul took a rare step “back in time,” demolishing a major downtown freeway to uncover and restore the ancient Cheonggyecheon stream that once flowed beneath it. An impressive feat of engineering, the project re-purposed more than 75 percent of the dismantled highway material for reconstruction and rehabilitation of the stream’s banks and commercial corridor. The Cheonggyecheon is now a vital part of the city’s commercial and tourism sectors, and has proven that environmental restoration can revive culture and community, as well.