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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