Campania, Italy
40.82 N, 14.13 E,
summit elevation 458 m
caldera
Campi Flegrei caldera lies 9 km west of Naples. It is a low-lying volcano completely surrounded by populated areas in the town of Pozzuoli. Houses are built right to the crater rim.
Two violent eruptions occurred at the volcano 12,000 and 35,000 years ago. Campi Flegrei caldera shows "bradyseism" which is the alternating uplift and sinking of the ground within the caldera.
Current activity at the volcano consists of solfataras in the crater. There have been two eruptions in historical times, in 1158 at Solfatara, and 1538 which formed Monte Nuovo cinder cone. Inflation and deflation has occurred at the caldera over the past 30 years without any eruptions.

Volcano is entered through an arch - John Seach

Solfatara Crater, Campi Flegrei - John Seach
1538, 1198.