A natural hill 85 km north-west of Xi'an that the Tang dynasty turned into the joint mausoleum of the emperor Gaozong and his consort Empress Wu Zetian — the only Chinese imperial burial in which a woman who ruled as emperor in her own right is interred alongside her husband. The hill is 1,000 metres long and unexcavated; the burial chamber inside has never been opened.
A 5-km "spirit way" runs up to the tomb, lined with stone winged horses, ostriches, lions, and the famous sixty-one headless stone envoys. A handful of Tang dynasty subsidiary tombs around the base of the hill have been opened and turned into small museums; the wall paintings inside the tomb of Princess Yongtai are some of the best surviving Tang paintings anywhere.
A long day trip from Xi'an, often combined with Famen Temple.