ナショナルジオグラフィックのインスタグラム(natgeo) - 2月11日 15時29分

Photo by @shonephoto (Robbie Shone) - The view looking straight down the entrance shaft into Devils Hole #2 in Ash Meadows Wildlife Refuge, Nevada. The cave is 200m (600ft) away from Devils Hole proper, where an endemic species of pupfish live. However fish do not live in DH2, which means that geologists can access the cave for research. Accessing the cave involves negotiating this 60ft vertical entrance pitch.

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