Beijing Ancient Observatory is located in the southwest side of Jianguomen crossroad at Dongcheng District. It is a special topic site museum of nature science displaying Chinese ancient ...

The site, at an altitude of more than 1,000m and with a 100m diameter, is described as the "Macedonian Stonehenge" and is ranked by NASA as the fourth oldest ancient observatory in the world ...

Archaeologists have uncovered the remains of an ancient Egyptian astronomical observatory at a temple site. The observatory, thought to date to the sixth century B.C., was built with mud bricks ...