ナショナルジオグラフィックのインスタグラム(natgeo) - 12月14日 19時51分

Photo by @shonephoto (Robbie Shone) - In total darkness, this vast cave dwarfs a team of explorers as they paddle a small inflatable boat along the underground river in Planinska jama, one of the longest river caves in Slovenia. 500 meters (1600ft) from the entrance of the cave is a confluence of two underground rivers: the Pivka River, flowing from the Postojna Polje through Postojna jama (cave), and the Rak River, flowing from Rak Škocjan. This is one of the largest confluences of subterranean rivers in Europe.
This portfolio of photographs was shot for @NatGeoAdventure from the famous river caves of Slovenia, birth place of speleology and home to the 'human fish'. With my caving colleagues I visited 8 caves, each one varied and different with its own personality. Words by Andrew Bisharat.
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