So you've traipsed around the Uffizi, eaten a gelato on the Ponte Vecchio, admired the view of the Tuscan countryside from one of San Gimignano's towers, but have you really seen everything that Italy has to offer? The bel paese may have cornered the market in artistic marvels and gastronomic delights, but it has more to offer than would first appear. Caving-known as ‘potholing' by the Brits and ‘spelunking' across the pond-is practised the length and breadth of Italy, from the warm horizontal caves of Sicily to the great cold abysses of the Veneto. The Italian peninsula is a land of majestic mountain ranges formed over millions of years of tectonic activity, making it the perfect place for the enthusiastic caver. Beneath Italy's surface are hundreds of miles of cave systems, only a fraction of which have been explored by man.