Guānxīng Tái Observatory
Guānxīng Tái Observatory information
Lonely Planet review
In the town of Gàochéng, 15km southeast of Dēngfēng, is China's oldest surviving observatory. In 1276 the emperor ordered two astronomers to chart a calendar. After observing from the stone tower, they came back in 1280 with a mapping of 365 days, five hours, 49 minutes and 12 seconds, which differs from modern calculations by only 26 seconds. Regular southbound buses from Dēngfēng can take you here; catch them from any large intersection in the southeastern part of town.