Tombs of Astana near Turpan.
The Astana Graves (Chinese: 阿斯塔那古墓, Pinyin: Āsītǎnà Gǔmù) are a series of underground tombs located 6km from the ancient city of Gaochang, and 42km from Turpan, in Xinjiang, China. The tombs were used by the inhabitants of Gaochang, both commoners and locals, for about 600 years from 200 CE – 800 CE. The complex covers 10 square kilometres and contains over 1,000 tombs. Different plots for separate castes and families are marked by gravel dividers. Due to the arid environment many important artifacts have been well preserved at the tombs, including natural mummies.