Mammoth Cave National Park, located in the state of Kentucky, has the world's largest network of natural caves and underground passageways, which are characteristic examples of limestone formations.
Mammoth Cave National Park, located in the state of Kentucky, has the world's largest network of natural caves and underground passageways, which are characteristic examples of limestone formations.
猛玛洞穴国家公园位于肯塔基州，是世界上最大的自然洞穴群和地下长廊，也是石灰岩地貌构成的典型代表。