Flowers and trees beautify the Seoullo 7017 manmade skygarden walking street in Seoul, South Korea

seoullo 7017 elevated skygarden sky park walking street flower tree pedestrian walkway beautify above seoul city skyline street seoullo downtown skyscraper linear park manmade skypark south korea tranquil building urban architecture travel cityscape business sky blue modern tourism landmark green design garden asia tower outdoors famous landscape plant summer nature color bridge highway