Short（短編）

Senbutsu Limestone Cave is a limestone cave in Hiraodai, Fukuoka Prefecture that has been designated as a national natural monument, and you can walk through the underground water and see the stalactites. Water drops in the cave ~ Water drops and trickling water ~ Small stream(Partially recorded)

千仏鍾乳洞は福岡県平尾台にある国の天然記念物に指定された鍾乳洞で、地下水の中を歩いて鍾乳石を見ることができる。洞内の水滴～水滴とチョロチョロと流れる水～小さな流れ（一部収録）

* There is also a paid version of "Sound in Nature" which is rich in episodes and has a long version.(Apple podcast only)

ロングバージョンのある有料版「Sound in Nature」もあります。

https://podcasts.apple.com/us/podcast/sound-in-nature/id1569798616