The Baths of Baia
The Archaeological Park of the Baths of Baia is the emblem of imperial Baia, a vacation and luxury destination
unrivaled in Ancient Rome. Here, emperors, senators, and patricians spent their holidays,
surrounded by breathtaking views of the Gulf and extraordinary natural hydrothermal resources.
Visiting Baia means taking a journey back in time to discover the “dolce vita” of the Roman elite.
From Private Villas to Thermal Complexes
Originally, the area was occupied by sumptuous private maritime villas, such as the “Villa dell’Ambulatio” and the “Villa della Sosandra”.
These residences were built on multiple levels along the hillside, featuring frescoes, precious marble floors, elegant porticos
and even private thermal areas. The luxury of Baia was such that it was criticized by many ancient authors as a symbol of debauchery.
During the imperial era, the villas were progressively transformed into large public thermal baths,
capable of hosting hundreds of visitors at once and making full use of the natural steam springs.
Tour Routes: The Baths and the Domes
1 The Temple of Mercury
- Actually a monumental thermal hall dating back to the Augustan era.
- Architectural record: the oldest large-scale hemispherical dome in opus caementicium ever built.
2 The Temple of Diana
- A large circular room used as a thermal environment.
- Decorated with marble and frescoes, it was one of the most frequented spaces in the complex.
3 The Temple of Venus
- Another monumental thermal building, mistakenly identified as a temple.
- Part of the route that showcases Roman hydrothermal engineering with pipes, basins, and calidaria.
Interior of the Temple of Mercury.
Info and Costs
Single site ticket: €5.00 (full) | €2.00 (reduced)
Phlegraean circuit combined ticket: €10.00 (full) | €5.00 (reduced)
- The ticket allows entry to the Archaeological Park of the Baths.
- Guided tours available upon reservation.
Tickets can be purchased on the Musei Italiani website
Opening Hours
Open: 9:00 AM – until one hour before sunset
Weekly closing: Monday
Partially accessible to people with motor disabilities (contact the Park for details).
How to Get There and Map
By car
- Naples Tangenziale – Pozzuoli/Arco Felice exit, follow signs for Bacoli.
By public transport
- From Napoli Montesanto: Cumana EAV train to Baia.
(Cumana Timetables) - From Naples (C.so Garibaldi, P.zza Vittoria, p.le Tecchio – Fuorigrotta): EAV Bus 101 to Bacoli P.zza De Gasperi.
(Bus Timetables)
Book your experience
Check out the available activities and select your favorite.
Check availability and book directly online.
