ナショナルジオグラフィックのインスタグラム(natgeo) - 12月22日 19時50分

Photo by @shonephoto (Robbie Shone) - Pictured during late Autumn, the mountain in the background, which lies in the Italian Dolomites is called Conturines - Spitze. It's recently been visited by a group of Italian cave explorers and scientists who, using a high precision 3D laser scanning instrument, have successfully surveyed the giant cavern that's hidden away inside. For El Cenote (cave) is one of Europe's largest underground chambers.

[BIHAKUEN]UVシールド(UVShield)

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