The water that gushes from the groundwater table of Mount Etna, the terrible and magnificent forge of mystery, comes out at 22° C and contains sulphureous-saline, bromine, iodic, and radioactive substances. These are indicated for the treatment of arthritis, rheumatism and respiratory problems.Aci Reale boasts an illustrious past connected to the love of Romans for its hot and precious waters, and a brilliant present thanks to continuous technological developments and tourism.