• Baia di Sorgeto (Forio) – Natural pools with hot, sulfur-rich water, accessible for free.
  • Spiaggia delle Fumarole (Sant’Angelo, Serrara Fontana) – Boiling sand due to underground steam.
  • Olmitello (Maronti, Barano d’Ischia) – Sulfurous spring near the famous Nitrodi Spring.
  1. FAMOUS SPRINGS AND SOURCES (DRINKING WATER OR THERAPEUTIC USE)
  • Fonte di Nitrodi (Barano d’Ischia) – Sulfate-alkaline water renowned for skin treatments.
  • Fonte di Cavascura (Maronti, Barano d’Ischia) – Thermal spring carved into the rock, used since Roman times.
  • Fonte di Citara (Forio) – Feeds the pools of Giardini Poseidon, the island’s largest thermal park.
  • Fonte delle Fornaci (Ischia Porto) – Ancient thermal spring with healing properties.
  1. THERMAL PARKS WITH SULFUR-RICH POOLS
  • Giardini Poseidon (Forio) – The largest thermal park, featuring pools at various temperatures with sulfurous water.
  • Negombo (Lacco Ameno) – Thermal park with pools surrounded by nature.
  • Castiglione (Casamicciola Terme) – Historic thermal park with hot, sulfur-rich waters.
  • Aphrodite Apollon (Sant’Angelo, Serrara Fontana) – Thermal pools with a sea view.
  • O’Vagnitiello (Casamicciola Terme) – A more intimate thermal complex with sulfurous water.
  1. HISTORIC THERMAL BATHS AND SPA FACILITIES
  • Terme di Ischia (Ischia Porto) – Ancient thermal baths offering mud treatments and sulfur baths.
  • Terme Belliazzi (Casamicciola Terme) – Historic spa with hyperthermal water.
  • Terme Manzi (Casamicciola Terme) – Hotel with thermal springs already used by the ancient Romans.

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