Tiankeng are huge sinkholes on land surfaces. The depth and width of a typical tiankeng may range from dozens of meters to hundreds of meters. Seen from the bottom, one can feels how imposing it can be.

Realistic frog patterns of early Yangshao culture gradually simplified into wavy lines during the Majiayao period, mostly appearing in groups and spreading horizontally around the surface of pottery. This layout delivered a more passionate and outward sensation. 

This piece of Yuan Dynasty (1271–1368) hunting patterned gold-wefted brocade was unearthed in Lukeqin Town, Shanshan County, Xinjiang. Thanks to the dry climate of this area, the brocade’s color remains brilliant hundreds of years after its production. 

In the darkness of night, the Xumi Mountain Buddha is enshrined by tender light, solemn and peaceful, as if to bring us back to the glorious time of the grottoes. Photo/ Xu Ligang 

The first noticeable feature of the Hanzhong Tiankeng cluster is that all these sinkholes are hidden in the dense primary  forests. Similar karst landscapes in southern provinces, such as Yunnan, Guizhou and so on, are all accompanied by stony mountains and peaks with sparse vegetation cover. That is what makes the Hanzhong tiankeng cluster stands out.Photo/ Shui Xiaojie

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