🇮🇹 Italy · Submerged site
Baiae (Baiae Archaeological Park)
Republican to Late Antique (140 BCE – 8th c CE) · Roman
Former luxury resort of Rome’s elite (Caesar, Nero, Hadrian) with imperial villa, submerged by bradyseism (volcanic uplift/subsidence) to 5–9 m, with mosaics, statues and pilings visible snorkelling.