Gaocheng Astronomical Observatory
Dengfeng, China
Gaocheng Astronomical Observatory, also known as the Dengfeng Observatory, is an observatory in Duke of Zhou's shrine, Gaocheng Town, near Dengfeng in Henan province, China. This site has a long tradition of astronomical observations, from the time of the Western Zhou up to the early Yuan dynasty. There is also a gnomon used for the Da Yan calendar in 729 AD and the great observatory of the Yuan dynasty. As part of the "Historic Monuments of Dengfeng in the 'Center of Heaven and Earth'" the observatory was listed as a UNESCO World Heritage Site in 2010.
Observatory data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).