Agnano Crater thermal

Agnano Thermal is a historic spa complex in the Agnano area of Naples, located within an ancient volcanic crater that forms part of the Campi Flegrei — the great Phlegrean Fields volcanic system that underlies the western suburbs of Naples and is one of the most geologically active and geologically complex zones in Europe. The bicarbonate thermal waters emerging from this volcanic crater have been used for therapeutic bathing since antiquity, and the site was famous in Roman times as the 'Stufe di San Germano' for its steam grottos and thermal pools. Today the thermal complex continues to exploit the Campi Flegrei's abundant geothermal resources for modern balneological treatments, offering a unique therapeutic experience in a geologically extraordinary setting. Agnano Thermal allows visitors to experience the ancient thermal heritage of the Neapolitan volcanic landscape — a living geological spectacle that has shaped human settlement, culture, and wellness in this corner of Campania for millennia.