Ryūsendō – The Most Charming Limestone Cave in the World


Ryūsendō Cave (龍泉洞) in Iwate Prefecture is one of the three biggest limestone caves in Japan. Limestone caves might not sound very exciting for some people, but when you see the charming underground sapphire blue lakes, will your answer change from “nope, not interested” to “yes, I’m going”?

As well as its beautiful blue colour, the lake water is also very transparent, so depending on the weather, it is possible to see quite deep into the water (=゚ω゚)ノ.

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