ナショナルジオグラフィックのインスタグラム(natgeo) - 2月5日 12時34分

Photo by Robbie Shone @shonephoto / At 2,100 meters (6,890 feet) underground, two Russian explorers begin their journey into the lowest levels of Veryovkina, where approximately a week later water suddenly plummeted into the cave’s chambers, quickly filling everything up and making a giant lake bubbling and jostling off the walls. This picture shows the shaft in pretty much normal conditions. When the flood pulse came though, all this space was wall-to-wall white water. It was terrifying and extremely loud. I didn’t have the time or the ability to make any photographs.

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