National Geographic Travelのインスタグラム(natgeotravel) - 5月13日 01時10分

Photo by Robbie Shone @shonephoto | Not every cave in China is overwhelmingly large. Some are small. Here, two explorers make progress along an awkward stretch of cave passage known as Where the Wind Blows, suitably named because of the strong wind that whistles through the small restriction, churning up dust and sand particles into the air and into their faces. Due to the size of the small tunnel, they are forced to push their caving sacks ahead of them., but actually this helps block out some of the sand and dust flying around in the air.

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