Cheomseongdae, oldest astronomical observatory in east Asia, Gyeongju, UNESCO World Heritage Site, South Korea, Asia

photography colour colour image color color image horizontal outdoors outside day nobody no one no one travel destination travel destinations travel cheomseongdae astronomical observatory gyeongju unesco unesco world heritage site world heritage site south korea korea korean rok republic of korea asia asian 7th century history historical historic heritage astronomy north gyeongsang province architecture architectural building exterior building buildings tower ancient stone ancient civilisation