Cheonggyecheon is a remarkable example of urban regeneration and environmental restoration in the heart of Seoul, South Korea. Once a neglected waterway, it has been transformed into a vibrant public space that stretches for nearly 11 kilometers through the city. This revitalization project, completed in 2005, not only brought back a natural stream but also created a peaceful haven for both residents and visitors, promoting biodiversity and sustainable urban living. Cheonggyecheon now stands as a symbol of Seoul's dedication to integrating nature within its urban landscape.