The Italian caldera volcano Campi Flegrei is located in the urban area of Pozzuoli and only 20 km away from Vesuvius. The name is derived from the Greek phlĂ©gein which means ‘to burn’. Freely translated, the name means “burning fields”. The name alone does not give a good idea! In fact, the Caldera volcano is often classified as a super volcano. The reason for this classification was a gigantic eruption about 37,000 years ago: ash deposits have been detected even at a distance of over 1000 km.