Overview
A caldera lake formed by an eruption around 150,000 years ago. It is home to marimo, spherical algae designated a special natural monument.
Original supplied text (not re-verified)
A caldera lake formed by an eruption around 150,000 years ago. It is home to marimo, spherical algae designated a special natural monument.
References
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百科形式の表示に対応しています。内容は公開情報に基づく個別確認が必要であり、現時点で完全な事実確認を示すものではありません。