Cheonggyecheon Stream Park Surrounded by High-Raise Office Skyscrapers with People Sightseeing in Seoul Downtown or Resting by the River Water

cheonggyecheon stream cheonggyecheon seoul south korea stream downtown urbanization river city cheonggye touristic park public urban development cityscape buildings center location skyscrapers people modern skyline design advertisement wall towers water architecture concrete developed landscape highrise glassy travel crowded summer skyscraper display leisure office day futuristic digital innovation relaxation high space mounted