The Solfatara of Pozzuoli: Between Science, Myth, and Faith
The Solfatara is not just a volcano, but a sacred place for geology and the religious history of Naples.
This crater, an integral part of the Phlegraean caldera, has always been considered a boundary between the world of the living and the underground abyss.
A Breathing Land: Unique Phenomena
- Fumaroles: the famous Bocca Grande and Bocca Piccola, with sulfur vapors that spread an unmistakable smell.
- Mofettes and mud: boiling mud pools and the ancient “Stufe” used as saunas and thermal therapies.
- Sulfur crystals: striking yellow encrustations around the fumaroles.
Myth and Beliefs: The Gateway to the Underworld
In the classical age, the Romans called it Forum Vulcani, identifying it as the entrance to the Underworld.
In the Middle Ages, a legend told that it was the prison of the Titans, imprisoned by Zeus.
The fumaroles are said to be their desperate breaths.
San Gennaro and Martyrdom
The Solfatara is also linked to the cult of San Gennaro.
Here, according to tradition, the Saint was beheaded in the 4th century AD during the persecutions of Diocletian.
Where his blood touched the ground, the Sanctuary dedicated to him was built.
A rock in the Sanctuary is said to turn red every time the miracle of the liquefaction of the blood is renewed in Naples.
The Solfatara Today
Due to an accident in 2017, the crater is currently closed to the public.
It is therefore not possible to visit the interior, but you can observe the volcano from the outside along Via Solfatara.
Useful Info
- Closed to the public: access to the inner crater is prohibited.
- Visible: from the overlook along Via Solfatara.
How to Get There and Map
By train
- Metro Line 2 or EAV → Pozzuoli-Solfatara stop, then a 10-15 minute walk (800 m) along Via Solfatara.
By car
- Naples Bypass (Tangenziale) – Agnano exit, then follow signs for Pozzuoli/Solfatara.




