pozzuoli, the super active volcano of the campi flegrei. the solfatara is the only visible mouth with its fumaroles

sand soil wall rock geology wood sea asphalt ruins beach coast shore temple walkway wadi monument badlands pozzuoli super active volcano campi flegrei solfatara visible mouth fumaroles fumarole sulfuric mineral vapor hot bradyism active mystery heat clouds mountains crater fog hydrothermal pozzuoli thermal volcanic phenomena fumaroles solfatara volcano valley eruption flegrei rock ecosystem caldera national park wildlife nature volcanic geyser hiking steam geothermal mountain tourism outdoor water sky italy naples sulfur beautiful bison orange barren palpitation