Grotta di Santa Barbara

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The Grotta di Santa Barbara lies deep within the abandoned San Giovanni mine some 4km west of Iglesias. The walls of the single enormous chamber are pockmarked with dark-brown crystals and white calcite, while stalactites and stalagmites give the impression of a ghostly underground forest. To ensure a spot on a guided tour, it's advisable to book through the tourist office in Iglesias.

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