Orrido di Cunardo, Complex and important unique hydrogeological tunnel in Lombardy. It develops in the form of a labyrinth of tunnels, now wide, now c

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Orrido di Cunardo, Complex and important unique hydrogeological tunnel in Lombardy. It develops in the form of a labyrinth of tunnels, now wide, now cramped, for about half a kilometer

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Photo credit: © PGMstock / Alamy / Afripics
License: Royalty Free
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Keywords: activity, adventure, cave, caver, cavern, caving, dark, deep, discovery, earth, exploration, explore, explorer, gallery, geologic, geology, grotto, interior, light, mineral, natural, path, rock, speleology, stone, tunnel, tunneling, underground, underpass