It's the deepest limestone cave in the U.S.
它是美国最深的石灰岩洞穴。
It was formed as a limestone cave during the glacial period.
它是于冰河时期形成的石灰岩洞。
This natural limestone cave is called the "Cave for the Mountain God".
这个天然形成的溶洞被称为“山神洞”。
This natural limestone cave is called the "Cave for the Mountain God".
这个天然形成的溶洞被称为“山神洞”。
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