![](http://www.ecns.cn/hd/2021/12/16/21966a0328bb41e0b77339b32b39b4fb.jpg)
The undated photo shows a boat passes through Mao Cave located in Laifeng County of central China's Hubei Province. (China News Service/Zhou Xingliang)
The water cave is 58 meters wide and 36 meters high, with a 215-meter swallet stream. It is formed by years of water erosion.
![](http://www.ecns.cn/hd/2021/12/16/a8359be6145a47e799fe17514ee7b005.jpg)
Undated Aerial photo depicts exterior scenery of Mao Cave located in Laifeng County of central China's Hubei Province. (China News Service/Zhou Xingliang)
![](http://www.ecns.cn/hd/2021/12/16/a22679a3f0bc4a5f852165e70430ab9d.jpg)
Undated Aerial photo depicts exterior scenery of Mao Cave located in Laifeng County of central China's Hubei Province. (China News Service/Zhou Xingliang)
![](http://www.ecns.cn/hd/2021/12/16/c6f01d3976c24cec960cd809fee647ac.jpg)
Undated Aerial photo depicts exterior scenery of Mao Cave located in Laifeng County of central China's Hubei Province. (China News Service/Zhou Xingliang)