Naples Underground Facts & Figures

The key numbers for planning a Naples Underground visit, drawn from the live tour listings and the site's own opening information. Where a figure is the operator's own statement rather than an independent measurement, it says so.

Detail	Value
Attraction	Naples Underground (Napoli Sotterranea) and related sites
City	Naples (Napoli), Campania, Italy
Depth below street level	About 40 metres (130 feet) on the main route
Steps to descend	About 121 (some visitors count closer to 150)
Approximate age	Parts around 2,400 years old; Greek-era quarrying
Rock type	Volcanic tuff (soft, easily quarried)
Original Roman use	Aqueduct and water cisterns
Twentieth-century use	Air-raid shelters during the Second World War
Notable feature	Buried Roman theatre associated with Emperor Nero
Temperature	Cool and steady year-round
Main entrance (this site)	Vico S. Anna di Palazzo 52, 80132 Napoli
Best-known entrance	Napoli Sotterranea, Piazza San Gaetano 68
Roman-ruins entrance	Neapolis Sotterrata, San Lorenzo Maggiore
Separate underground	Bourbon Tunnel (Galleria Borbonica), Via D. Morelli
Hours (Vico S. Anna, Mon–Fri)	09:30–16:30
Hours (Vico S. Anna, Sat–Sun)	09:30–18:00
Entry ticket, from	About $21–$22 per person
Underground-only tour length	About 1 to 1.5 hours
Combined city + underground tour	About 2.5 to 4 hours
Tour languages	Usually Italian and English
English departures	Limited (official ticket: around midday and mid-afternoon)
Wheelchair access (aqueduct)	Not accessible
Wheelchair access (Bourbon Tunnel)	Partly accessible, about 60% of the route
Minimum age (typical)	3–4 years, depending on operator
Suitable for claustrophobia	No — narrow passages, though most can be skipped
What to bring	Comfortable closed shoes; a phone torch
Not to be confused with	The Catacombs of San Gennaro (a separate site)
Free cancellation	Most tours, up to 24 hours before
Non-refundable tours	A few (e.g. some day trips and the Bourbon Tunnel)
Tours compared on this site	Across two booking platforms