Archeoemozioni: Discovering the Mosaics of Baia Sommersa
Glide over sunken Roman villas and uncover ancient mosaics from the deck of a glass-bottom boat
This glass-bottom boat tour of Baia Sommersa offers a rare window into one of the Mediterranean's most significant submerged archaeological sites, where entire Roman-era villas lie preserved beneath the waters of the Phlegrean coast. Guided by a diver from the Baia Submerged Archaeological Park and an on-board historian, participants witness intricate mosaics in their original underwater setting without ever leaving the boat.
The ancient town of Baia was once a celebrated resort for Rome's elite, renowned for its thermal baths and luxurious seaside estates. Bradyseism, the slow volcanic ground movement characteristic of the Phlegrean Fields, gradually caused this coastal settlement to subside beneath the sea over centuries, leaving its structures remarkably intact.
During the excursion, a professional diver descends to the mosaic floors and interacts with the group through the transparent hull, pointing out specific architectural and decorative details that would otherwise be easy to miss. The on-board guide contextualises each site with commentary on Roman history, archaeology, and the unique volcanic geology of the area.
After exploring the submerged zone, the boat travels along the coastline, offering views of Monte Nuovo, the youngest volcano in Italy formed during a 1538 eruption, and the commanding Aragonese Castle of Baia perched above the bay.
Tour Highlights
Observe submerged Roman villas through a transparent boat hull without diving or snorkelling equipment.
Admire original black-and-white and polychrome mosaics of Villa a Protiro and the Terme del Lacus in situ.
Benefit from live commentary by a certified diver from the Baia Submerged Archaeological Park and a dedicated on-board guide.
Explore a UNESCO-recognised archaeological seascape shaped by ongoing volcanic bradyseism activity.
View the Aragonese Castle of Baia and Monte Nuovo from the sea during a scenic coastal cruise.
Suitable for all ages and mobility levels — no swimming ability required for this entirely boat-based experience.
Itinerary
The excursion begins at the port of Baia, where participants board the glass-bottom boat and receive a brief orientation from the on-board guide covering safety and the history of the submerged site.
The boat positions over Villa a Protiro, one of the most recognisable submerged structures of Baia. The diver descends and guides attention to the finely preserved black-and-white mosaic floors that once adorned this elegant Roman residence.
Moving to the thermal bathing complex known as Terme del Lacus, participants observe vibrant polychrome mosaics still visible beneath the shallow seabed. The guide explains the social and architectural significance of Roman thermal culture.
The boat returns along the Phlegrean coastline, passing Monte Nuovo — the youngest volcanic cone in Italy — and offering a sea-level perspective of the historic Aragonese Castle of Baia before returning to the harbour.
What Is Included
Included
- Glass-bottom boat excursion
- On-board English-speaking guide
- Live commentary from a certified Baia park diver
- Coastal cruise along the Phlegrean shore
- Views of Villa a Protiro and Terme del Lacus mosaics
Not Included
- Hotel pick-up and drop-off
- Food and beverages
- Personal travel insurance
- Gratuities for guide and diver
Important Information
Reserve Your Place on the Glass-Bottom Boat
Spaces on each departure are limited to ensure an intimate and high-quality experience over the submerged ruins of Baia. Secure your spot in advance to avoid disappointment.
Book Now
