ナショナルジオグラフィックのインスタグラム(natgeo) - 7月30日 07時35分

Photo by Robbie Shone @shonephoto Lechuguilla Cave, part of the Carlsbad Caverns National Park, is beautiful and highly protected. Access is strongly controlled and only given to experienced cavers with specific scientific or exploration goals within certain parts of the cave. Posing for scale here, an American speleologist admires the giant tunnel known as Lebarge Borehole. At this point in the cave, it offered the first opportunity to collect drinking water, something our expedition team required because it's so hot down there.

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