There are about 150 pools of boiling mud dotted around the ca 17 km by 20 km large caldera which represents the Phlegraean fields, hydrothermal surface expressions of the hot magma that still resides at depth. (Photo: Ingrid Smet)
Copyrights:VolcanoDiscovery / VolcanoAdventures or sources as noted. Use of material: Text and images on this webpage are copyrighted. Further reproduction and use without authorization is not consented. If you need licensing rights for photographs, for example for publications and commercial use, please contact us.
Eager to learn about volcanoes and the fascinating world around them? Visit VolcanoDiscovery