ナショナルジオグラフィックのインスタグラム(natgeo) - 6月6日 19時10分

Photo by @shonephoto (Robbie Shone) - What is exploration? - Discovering a mysterious world that was previously unknown to us all. Pictured here, an American cave explorer traverses ropes into a giant underground void full of fog. Discovered only a few years ago, Cloud Ladder Hall in China is one of the world’s largest cave chambers. How many more exist, just waiting to be found?

[BIHAKUEN]UVシールド(UVShield)

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