For a glimpse into the past, the Casa Grotta di Vico Solitario gives an insight into cave furnishings and living conditions of the 1950s.
BBC: Italy's secret caves
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Two of the best deep dives are both at 42 meters: At Lo Scoglio del Medico, barracudas swirl around you, while at La Grotta dei Gamberi, sparkling shrimp eyes welcome you in the darkness.