ナショナルジオグラフィックのインスタグラム(natgeo) - 8月21日 20時09分

Photo by @shonephoto (Robbie Shone) - Following a long shoot where we worked through the night in Eisriesenwelt (literal translation "ice-giant-world") we emerged from the cave at 1656 meters (5435ft) asl in the early hours of the morning. Eisriesenwelt was formed by the Salzach river, which eroded a network of tunnels through the mountain. Nowadays the river flows over 1km (3600ft) below the cave in the valley bottom.

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