Solfatara

The Solfatara is a volcanic crater in the Campi Flegrei near Pozzuoli. Fumaroles, steam and altered ground make it one of the most recognisable expressions of the area's hydrothermal landscape.

Why it matters

The crater shows that volcanic activity is not limited to eruptions. Heated fluids and gases circulate below ground and emerge at the surface, linking visible emissions with a much deeper volcanic system.

What to notice

The broad crater floor contrasts with the concentrated vents of steam and gas. Pale altered surfaces and fumarolic deposits give the terrain its distinctive appearance. The neighbouring Pisciarelli hydrothermal field is closely associated with this wider geological setting, but is a separate locality.

Context and history

The Solfatara has long belonged to the cultural identity of the Phlegraean Fields and their thermal landscape. Modern volcanology has added a different way of interpreting its emissions, combining gas measurements, ground deformation and seismic observations. Research distinguishes shallow hydrothermal processes from the deeper magmatic system that drives the region's long-term unrest.