Naples Underground

How to visit without missing the English tour

Naples Underground is not a site you walk around on your own — every visit is a guided tour, so the number that matters is the tour time, not the ticket price. Italian-language tours leave roughly on the hour from about 10:00 to 18:00, but English tours run only every two hours or so (typically 10:00, 12:00, 14:00, 16:00 and 18:00). Turn up at the wrong moment and you either wait for the next English slot or stand through 90 minutes of Italian.

The entrance catches people out: it is at Piazza San Gaetano 69, on Via dei Tribunali in the centro storico, beside the Basilica of San Paolo Maggiore — a modest doorway on a busy pizza-lined street, not a grand ticket hall. You can buy on the door for about €10 and join the next tour, but a ~€15 online ticket locks in a confirmed English time, which is worth it on a summer weekend. The descent is 136 steps down to about 40 metres below the road, with a couple of narrow, candle-lit passages on the way through the old aqueduct channels.

What you see, and is it worth it?

The route runs through the Greek-Roman cisterns and aqueduct tunnels cut into the soft tuff stone, the WWII air-raid shelters that families sheltered in (with original graffiti and a small war museum), and a hidden hatch into the remains of a Greco-Roman theatre sitting under the apartments above. It is the version of Naples you cannot read off the street.

Worth it for the contrast — you go from chaotic Via dei Tribunali to silent 2,000-year-old water channels in a few minutes — but it is genuinely physical. Skip it if you are claustrophobic, unsteady on steps, or travelling with a pushchair, because the narrow passages and 136 steps have no lift alternative. Pair it with a walk along Spaccanapoli rather than stacking it against another underground site like the Galleria Borbonica the same day; one tunnel tour is plenty for an afternoon.