ナショナルジオグラフィックのインスタグラム(natgeo) - 2月16日 04時12分

Photo by @shonephoto (Robbie Shone) - Currently on expedition in the Italian Dolomites exploring Bigonda Cave in Selva de Grigno. Discovered in 1952, this is arguably the longest cave in the Dolomites, but due to snow melt one of the 50 internal lakes has completely filled the passage and blocked the main thoroughfare through the cave and our trip has been cut short. An Italian cave explorer (pictured) grabs a quick drink of water from one of the many inlets now seeping through the cave.

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