石せっ灰かい洞どう

noun

limestone cave

A natural cave formed in limestone, often featuring stalactites and stalagmites. Common in geological and travel contexts.

• この地ち域いきには多おおくの石せっ灰かい洞どうがある。

  There are many limestone caves in this area.

• 石せっ灰かい洞どうの中なかは夏なつでも涼すずしい。

  It is cool inside a limestone cave even in summer.