Solfatara is a shallow volcanic crater in Pozzuoli, within the Campi Flegrei west of Naples. Its fumaroles release sulfurous steam, and the crater’s geothermal activity has also produced hot mud and vivid yellow and red mineral deposits. The site was once mined for alum, sulfur and kaolin, and later used for thermal treatments. Access has been closed for construction or safety reasons since 2017, so check its status before setting out. If the park is closed, a road about 50 metres uphill provides views of the crater.
A crater in the Campi Flegrei
Solfatara is a shallow volcanic crater in Pozzuoli, part of the Campi Flegrei volcanic area west of Naples. The area is known for hydrothermal activity, visible at Solfatara in jets of sulfurous steam. Hot mud and mineral deposits in yellow and red tones are also associated with the crater.
The Phlegraean Fields contain a complex of ancient volcanoes. Solfatara is one of their most visible expressions, where heat and gases rise through the ground. Its activity has drawn attention for centuries, and the area was included in the Grand Tour taken by European aristocrats in the 18th century.
From mining to thermal treatments
Solfatara was mined for alum, sulfur and kaolin. Around 1900, a thermal bath was built at the site. Its mud, sulfurous water and steam were used for treatments, including steam baths known as the Stufe.
The crater’s geothermal features have shaped both its history and its appearance. Sulfurous emissions leave colorful deposits on the surrounding ground, while steam vents show that heat remains beneath the surface.
Check access before you go
Access to the park has been closed for construction or safety reasons since 2017. Conditions can change, so check whether entry is permitted before making the trip to Pozzuoli.
If the park is closed, a road about 50 metres uphill provides views of Solfatara. For a quieter stop, plan around off-peak hours or seasons. The site is part of an active volcanic area, so follow any access restrictions in place.
FAQ
Is Solfatara open to visitors?
The site has been closed for construction or safety reasons since 2017. Check its current access status before travelling.
Can you see Solfatara if the park is closed?
A road about 50 metres uphill provides views of the crater, even when the park is closed.
What can you see at Solfatara?
The crater is known for sulfurous steam vents, hot mud and yellow and red mineral deposits. Access to these features depends on whether the park is open.
