artificial waterfall and rocks in cheonggyecheon stream, seoul, south korea. long exposure

artificial waterfall rocks cheonggyecheon stream seoul south korea long exposure architecture asia asian blur circle city closeup construction culture design downtown famous garden han river heritage history journey korean landmark no people nobody outdoors park pond public recreation reflection rock scenery scenic skyscrapers stairs steps stone tourism tourist travel urban vacations water yellow iicedil isup2 shy esup3 arranged