# Naples underground geothermal zone, Italy: what it is and when to go > Naples underground geothermal zone is an underground museum in Chiaia, Municipality 1 of Naples, Italy. Interests: History. The best time to visit is March to June and September to October. In June there are 14 h 55 of daylight, and in December, 9 h 05. It has articles in 7 Wikipedias, so it is not one of the busiest places in Italy: one to enjoy at a calmer pace. Here is what it is, where it lies, when to come, how to get there and what else is nearby to turn it into a trip. - Address: https://kokai.app/en/paises/europa/italia/napoli-sotterranea/ - Reviewed on: 2026-10-02 - Language: en ## In a nutshell - **What it is:** Underground museum in Chiaia, Municipality 1 of Naples, Italy · History - **Where:** Italy · Piazza San Gaetano 69, 80138 - **Best time:** March to June and September to October. - **Nearest airport:** NAP Napoli, 4.8 km as the crow flies - **Opening hours:** Mo-Fr 10:00-18:00; Sa-Su 09:30-18:00 - **Website:** [napolisotterranea.org](https://www.napolisotterranea.org/) - **Coordinates:** 40.85108, 14.25685 ## What it is and where Naples underground geothermal zone is an underground museum in Chiaia, Municipality 1 of Naples, Italy. It has articles in 7 Wikipedias, so it is not one of the busiest places in Italy: one to enjoy at a calmer pace. It is in [Naples](https://kokai.app/en/paises/europa/italia/napoles/), where this site lists 191 more places to see, 1.5 km from the centre. Its coordinates are 40.85108, 14.25685; the nearest main airport is Naples International Airport (NAP, Napoli), 4.8 km as the crow flies. How to get around Italy (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/europa/italia/#moverse). - [Where it is](https://www.google.com/maps/search/?api=1&query=40.851079%2C14.256847) - [Directions](https://www.google.com/maps/dir/?api=1&destination=40.851079%2C14.256847) It is one of the [History](https://kokai.app/en/paises/europa/italia/historia/) places in Italy. In [Kokai](https://kokai.app/en/) it is already on your trip map next to the places you save yourself, and it goes into a day's plan with one tap. ## When to go The best time to visit Naples underground geothermal zone is **March to June and September to October**. | Mes | Época | Hours of daylight | | --- | --- | --- | | January | Possible | 9 h 23 | | February | Possible | 10 h 26 | | March | Best time | 11 h 40 | | April | Best time | 13 h 06 | | May | Best time | 14 h 17 | | June | Best time | 14 h 55 | | July | Possible | 14 h 39 | | August | Possible | 13 h 38 | | September | Best time | 12 h 15 | | October | Best time | 10 h 53 | | November | Possible | 9 h 40 | | December | Possible | 9 h 05 | In June there are 14 h 55 of daylight, and in December, 9 h 05. Daylight hours are calculated from the site's latitude for the 15th of each month; when planning a full day on foot they matter as much as the weather. When to go to Italy in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/europa/italia/#cuando-ir). ## Before you go to Italy To enter Italy there are 6 things to sort out before you leave, starting with “Valid ID card (DNI) or passport”: they are all, with their deadlines, in [the Italy checklist](https://kokai.app/en/paises/europa/italia/#antes-de-salir). Currency: Euro (EUR); plugs: Type C, F and L · 230 V · 50 Hz (type L, with three pins in a row, needs an adapter); emergencies: 112. In [Kokai](https://kokai.app/en/) you tick off the checklist inside your trip, and each item reminds you when it is time to do it. ## What is nearby - [San Paolo Maggiore, Naples](https://kokai.app/en/paises/europa/italia/basilica-di-san-paolo-maggiore/): Church building in Naples, Italy · 31 m - [San Lorenzo Maggiore, Naples](https://kokai.app/en/paises/europa/italia/basilica-di-san-lorenzo-maggiore/): Church in Naples, Italy · 102 m - [Purgatorio ad Arco](https://kokai.app/en/paises/europa/italia/chiesa-di-santa-maria-delle-anime-del-purgatorio-ad-arco/): Church · 109 m - [Santa Maria della Colonna](https://kokai.app/en/paises/europa/italia/santa-maria-della-colonna/): Church · 164 m - [Girolamini, Naples](https://kokai.app/en/paises/europa/italia/chiesa-dei-girolamini/): The Church and Convent of the Girolamini · 169 m Distances are as the crow flies. Everything else is in [the Italy guide](https://kokai.app/en/paises/europa/italia/). ## More in Italy: History - [Vatican City](https://kokai.app/en/paises/europa/italia/ciudad-del-vaticano/): Holy See's independent state, an enclave within Rome, Italy - [Venice](https://kokai.app/en/paises/europa/italia/venecia-2/): capital city of Veneto, Italy - [Florence](https://kokai.app/en/paises/europa/italia/florencia-2/): Italian city and commune, located in Tuscany - [Naples](https://kokai.app/en/paises/europa/italia/napoles-2/): capital city of Campania, Italy - [Colosseum](https://kokai.app/en/paises/europa/italia/coliseo/): ancient Roman amphitheatre, a landmark of Rome, Italy - [St. Peter's Basilica](https://kokai.app/en/paises/europa/italia/basilica-de-san-pedro/): church in Vatican City Every Italy place under History, each with its season, is on [its page](https://kokai.app/en/paises/europa/italia/historia/). ## Frequently asked questions ### What is Naples underground geothermal zone? It is an underground museum in Chiaia, Municipality 1 of Naples, Italy. It has articles in 7 Wikipedias, so it is not one of the busiest places in Italy: one to enjoy at a calmer pace. ### When is the best time to visit Naples underground geothermal zone? March to June and September to October. In June there are 14 h 55 of daylight, and in December, 9 h 05. ### How do you get to Naples underground geothermal zone? The nearest main airport is Naples International Airport (NAP), 4.8 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=40.851079%2C14.256847) opens the route on the map, and how to get around Italy is explained in [its country guide](https://kokai.app/en/paises/europa/italia/#moverse). ### How do I add it to my trip? With one tap. In Kokai it is already on the Italy map, next to the places you save yourself: add it to a day's plan, give it a time and, if you like, get a reminder when you pass nearby. ### What else is around here? Nearby you have [San Paolo Maggiore, Naples](https://kokai.app/en/paises/europa/italia/basilica-di-san-paolo-maggiore/), [San Lorenzo Maggiore, Naples](https://kokai.app/en/paises/europa/italia/basilica-di-san-lorenzo-maggiore/), [Purgatorio ad Arco](https://kokai.app/en/paises/europa/italia/chiesa-di-santa-maria-delle-anime-del-purgatorio-ad-arco/). The rest is in [the Italy guide](https://kokai.app/en/paises/europa/italia/). Data from [OpenStreetMap](https://www.openstreetmap.org/node/5126351599), licensed under the ODbL, and from [Wikidata](https://www.wikidata.org/wiki/Q721189), CC0. More about Naples underground geothermal zone on [Wikipedia](https://en.wikipedia.org/wiki/Naples_underground_geothermal_zone). Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).