Du An China - The Land of the Ancient Abyss

[Curt Bowen]

http://www.advanceddivermagazine.com...2013/duan.html

Massive cave entrances, some a hundred meters wide, dot the landscape from the upper mountain gorges to the flat plain valley along Red River. Mountain cave resurgences supply millions of gallons of water during the summer rainy season, feeding the rice paddy fields. READ MORE....