
Posillipo, Marechiaro and the Gaiola
Posillipo is the green ridge that closes the Naples seafront to the west, lined with villas and ending in cliffs of yellow tuff. At its tip, two islets sit a few meters offshore: the Gaiola. The sea around them, from the hamlet of Marechiaro to the bay of Trentaremi, is a protected underwater park of 41.6 hectares, with the ruins of Roman villas above and below the water.
This walk links the clifftop, the park and Marechiaro: about 6 km (3.7 miles) from the bus terminus, including a steep climb back up from the sea. Entry to the Gaiola is free, but the rules change with the season, and two things are closed or half-closed as of September 30, 2026: the Pausilypon archaeological park shuts from October 1, 2026, and Parco Virgiliano is only partly open while it is restored.
At a glance
- Distance
- About 6 km (3.7 miles) from the Capo Posillipo bus terminus: out to Parco Virgiliano and back, down to the Gaiola and back up, then down to Marechiaro. 4.3 km without Parco Virgiliano.
- Time
- About 80 minutes of walking; half a day with the park and the sea.
- Gaiola access
- Free every day. May to September: online booking required, 9 a.m. to 1 p.m. and 2 p.m. to 6 p.m. October to April: register at the gate or book online, maximum 200 people.
- Winter hours
- October, November, March and April 10 a.m. to 5 p.m.; December to February 10 a.m. to 3 p.m. Closed on weather-alert days.
- Closed
- The Pausilypon archaeological park is closed from October 1, 2026 for restoration. Parco Virgiliano is only partly open while works run into 2027.
- Getting there
- ANM buses to Capo Posillipo: 140 from Via Santa Lucia, C21 from Mergellina, C27 from Piazza Amedeo, C31 from Via Scarlatti. €1.30 a ride.
In this guide
The route
- Start at the Capo Posillipo bus terminus, at the top of Discesa Gaiola.
- Out to Parco Virgiliano and back, about 850 meters each way along Viale Virgilio. The clifftop park has belvederes over Nisida, the Campi Flegrei and the islands. Skip it and the walk is 4.3 km.
- Down Discesa Gaiola to the park gate, about 1.45 km, dropping roughly 115 meters to the sea. Steep and partly stepped.
- Back up the same way, about 1.45 km. OpenStreetMap shows no public path along the shore to Marechiaro.
- Discesa Coroglio and Via Marechiaro down to the hamlet of Marechiaro, about 1.4 km, with its small harbor and restaurants at the water's edge.
Distances are from OpenStreetMap foot routing; heights are approximate. From Marechiaro, climb back up Via Marechiaro to the bus stops on Discesa Coroglio.
The Gaiola: booking rules by season
The park is run by the Centro Studi Interdisciplinari Gaiola, a non-profit. Access is free every day, but how you get in depends on the month:
| Season | How to enter | Hours |
|---|---|---|
| May to September | Online booking required; free electric shuttle and free beach umbrellas | 9 a.m. to 1 p.m. and 2 p.m. to 6 p.m. |
| October, November, March, April | Register at the gate or book online; capacity 200 people | 10 a.m. to 5 p.m. |
| December to February | Register at the gate or book online; capacity 200 people | 10 a.m. to 3 p.m. |
On days with a regional weather alert, the park stays closed; check the Campania civil protection bulletin before you set out. In summer the morning and afternoon are separate slots, so book the one you want.
Inside, you can hire an audioguide at the visitor center, Tuesday to Sunday, for €3; it lasts about 20 minutes and comes in Italian and English. The park also runs glass-bottom boat trips, snorkeling tours and kayak routes; see kayaking along Posillipo.
One more warning: in May 2025 a sinkhole opened on the pedestrian part of Discesa Gaiola and the city's civil protection closed the park. It ran events again in 2026, but a reopening date was not posted; if the lane is barred, that is why.
What is closed in 2026-27
- Pausilypon, the archaeological park of the Roman villa above the Gaiola, entered through the Roman tunnel of the Grotta di Seiano: closed from October 1, 2026 for restoration and safety work, with no reopening date.
- Parco Virgiliano: closed for works in spring 2026, partly reopened from June 27, 2026. The entrance plaza, the north avenue and the belvederes are open; the rest of the work runs into 2027. Hours are 7 a.m. to 9 p.m. from September to June and 7 a.m. to midnight in July and August.
Getting there and back
Buses climb Posillipo to the Capo Posillipo terminus, a few minutes from the top of Discesa Gaiola. In OpenStreetMap's route data, the stops there are served by ANM lines 140 (from Via Santa Lucia along the seafront), C21 (from Mergellina), C27 (from Piazza Amedeo) and C31 (from Via Scarlatti on the Vomero). An ANM single ride is €1.30. Check ANM's live information for timetables. See getting around Naples for tickets.
Taxis also work, and save the uphill wait for a bus at the end.
Who this walk is for
- Swimmers and snorkelers from May to September, with a booked slot.
- Walkers who want a quieter, greener Naples and can manage the climb back.
- Anyone on a longer stay: on a two- or three-day trip, the Lungomare walk gives you the sea with none of the logistics.
- Not for: strollers, wheelchairs, a hot midday, or winter afternoons when the gate shuts at 3 p.m.
Tickets and tours you can book

Naples : Snorkeling with a marine biologist & authorized guide
Up to 12. Soft drinks included; no food listed. Not for pregnant travellers or babies.
Rating as shown on Viator

Naples: Wild Posillipo Kayak Tour
Starts at Via Posillipo 68. Moderate fitness needed; not for non-swimmers or anyone over 118 kg. Only 53 reviews.
Rating as shown on GetYourGuide
Booking through these links supports this site at no cost to you. Prices move by date, so we do not print them here; the official prices we checked are in the page above.
Frequently asked questions
Do you need to book the Gaiola underwater park?
From May to September, yes: access is free but requires online booking, in a morning (9 a.m. to 1 p.m.) or afternoon (2 p.m. to 6 p.m.) slot. From October to April you can register at the gate or book online, up to 200 people at a time.
Is the Gaiola free?
Yes, entry is free all year. The audioguide costs €3. Guided snorkeling, glass-bottom boat and kayak trips are paid extras.
What are the Gaiola opening hours in winter?
10 a.m. to 5 p.m. in October, November, March and April, and 10 a.m. to 3 p.m. from December to February. The park closes on days with a regional weather alert.
Is the Pausilypon open?
No. The Pausilypon archaeological park closes from October 1, 2026 for restoration and safety work. No reopening date had been announced on September 30, 2026.
How do you get to the Gaiola by bus?
Take an ANM bus to Capo Posillipo: in OpenStreetMap's route data, line 140 from Via Santa Lucia, C21 from Mergellina, C27 from Piazza Amedeo or C31 from Via Scarlatti. Then walk down Discesa Gaiola, about 1.45 km.
Further reading
Official sources
- Parco Sommerso di Gaiola - access (official) – Free; May to September online booking, 9 a.m. to 1 p.m. and 2 p.m. to 6 p.m., electric shuttle and umbrellas; October to April gate registration or booking, 200 people, winter hours; weather-alert closures; checked September 30, 2026
- Parco Sommerso di Gaiola - home (official) – 41.6 hectares from Marechiaro to Trentaremi, managed by Centro Studi Interdisciplinari Gaiola; checked September 30, 2026
- Parco Sommerso di Gaiola - audiotour (official) – €3, about 20 minutes, Italian and English, Tuesday to Sunday; checked September 30, 2026
- Parco Sommerso di Gaiola - Pausilypon (official) – Pausilypon closed from October 1, 2026 for restoration and safety work; Grotta di Seiano access; checked September 30, 2026
- Parco Sommerso di Gaiola - notices (official) – Closure from May 26, 2025 after a sinkhole on Discesa Gaiola; checked September 30, 2026
- Comune di Napoli - Parco Virgiliano partial reopening (official) – Partial reopening from June 27, 2026, works ending in 2027; checked September 30, 2026
- Comune di Napoli - Parco Virgiliano (official) – Seasonal hours, entrances Viale Virgilio and Via Tito Lucrezio Caro; checked September 30, 2026
- OpenStreetMap - bus route relations and foot routing – Lines 140, C21, C27, C31 at Capo Posillipo and Discesa Coroglio stops; walk about 6.0 km (Capo Posillipo to Parco Virgiliano 848 m each way, Discesa Gaiola down 1,456 m and up 1,456 m, to Marechiaro 1,405 m); computed September 30, 2026
- UnicoCampania - fare schedule (valid from May 6, 2024) – ANM single ride €1.30; checked September 30, 2026


