Zhang Fengrong, 58, was woken at 2am by a loud roaring sound.

He and his son Zhang Shiyin rushed outside and saw the earth opening up before their eyes.

A mysterious sinkhole suddenly appeared at the vegetable garden of Zhang Shiyin, a villager, in his own yard on Jan. 13, Shuangshan Village, Leshan City of Sichuan Province. The diameter of the sinkhole has increased to about 20 meters and it is severely threatening Zhang’s house, but it has not resulted in any casualties until now. (Photo by Chinanews/Liu Zhongjun)