Karst cave

Includes carbonatite cave, gypsum cave and salinastone cave. The carbonatite cave, formed by karstification and represented by limestone cave, is the widest distributed one with largest number and scale in China.
As most of all natural caves are karst caves, especially the caves opened for public tour, except for few individual ones, therefore, cave usually has the same meaning with karst cave in practical use.
Up to June, 2008, there have been 78 caves with measured length over 5km in China, among which, 25 ones have the length of over 10km; there have been 60 caves with depth over 250m, among which, 17 ones have the depth of over 400m; there have been 25 cave chambers with the area of more than 2×104m2. The vast majority (72/78) of these large caves are distributed in the southwest of China.
 
Gypsum cave
 
Salinastone cave

Carbonatite cave