The caves of Vallorbe, in the Vaud Jura, are among the most beautiful in Europe and offer a fascinating natural spectacle. Over millions of years, the limestone layers have been eroded by the Orbe, a river that flows underground before bursting out of the rock in the form of a resurgence, next to the entrance of the caves. Inside this natural site, an exhibition of minerals - "The treasure of the fairies" - gathers a collection of more than 250 minerals from all over the world under four domes dug in the rock.


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