It seems that nature intended to bestow one of its most wonderful gifts upon this peninsula on Lake Garda: thermal spring waters. The sulphurous thermal waters at Sirmione Terme are rich in sodium, bromine and iodine. They originate as the purest rainwater 30 km from Sirmione in the drainage basin of Monte Baldo, in the Veneto Region. Here the waters filter down from a height of 2,200 metres to a depth of 2,500 metres below sea level, where they become hot and rich in beneficial minerals. It takes more than 20 years to complete this cycle, before the waters gush forth from the Boiola, Virgilio and Catullo thermal springs at a temperature of 70°C.