The spa is located on the slopes of an extinct volcano.
The thermal activity at Agnano has ancient origins, documented by an extensive bibliography and
significant archaeological sites.
Examples are the Stufe di San Germano, named after the Bishop of Capua here that cared for arthritis associated with skin disease: alongside the sources were in fact discovered the ruins of the ancient Roman baths and wall fragments of Greek origin.
The "stove" geysers are rich in hydrogen sulfide and minerals, using a dry climate, with temperatures ranging from 40 to 70 degrees Celsius, creating greater humidity of the soil and stimulating blood circulation.