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Naples
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Napoli Sotterranea

Napoli Sotterranea
Photo: Armando Mancini from Napoli, Italia, CC BY-SA 2.0 (licence)

Running beneath the Italian city of Naples and the surrounding area is an underground geothermal zone and several tunnels dug during the ages. This geothermal area is present generally from Mount Vesuvius beneath a wide area including Pompei, Herculaneum, and from the volcanic area of Campi Flegrei beneath Naples and over to Pozzuoli and the coastal Baia area. Mining and various infrastructure projects during several millennia have formed extensive caves and underground structures in the zone.

From Wikipedia, CC BY-SA 4.0.

Address
69 Piazza San Gaetano
Hours
Closed · opens 10 am tomorrow
Weekly hours
Mon10 am–6 pm
Tue10 am–6 pm
Wed10 am–6 pm
Thu10 am–6 pm
Fri10 am–6 pm
Sat9:30 am–6 pm
Sun9:30 am–6 pm

Place data from OpenStreetMap, © OpenStreetMap contributors, ODbL.

Also listed in Overture Maps open data.

Updated 29 Sept 2026. Something wrong? Tell us.